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98x_Manual_531376-1_A.qxd 2/23/2005 11:39 AM Page 1 ...
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i Thank Y ou! Thank you for choosing Humminbird®, America's #1 name in fishfinders. Humminbird® has built its reputation by designing and manufacturing top- quality , thoroughly reliable marine equipment. Y our Humminbird® is designed for tr ouble-free use in even the harshest marine environment. In the unlik ely event that your Humminbird? ...
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ii T ABLE OF CONTENTS 900 Series™ Introduction 1 How the 900 Series™ W orks .................................................................................................. 1 Side Imaging Sonar ............................................................................................................ ........ 1 DualBeam PLUS™ Sonar ....... ...
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iii T ABLE OF CONTENTS Chart/Bird’ s Eye Combo View (987c SI C ombo models only) .......................................... 38 Chart View (987c SI Combo models only) .............................................................................. 39 Chart/Sonar Combo View (987c SI C ombo models only) ................................................ ...
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iv T ABLE OF CONTENTS Fish ID Sensitivity ............................................................................................................ .......... 61 Real Time Sonar (RTS®) Window ........................................................................................ 61 Bott om View ................................................. ...
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v T ABLE OF CONTENTS Daylight Saving Time (Advanced, 987c SI C ombo models only) ...................................... 79 Position Format (Advanced, 987c SI C ombo models only) .................................................. 79 Time Format (Advanced, 987c SI C ombo models only, In ternational only) ...................... 80 Date Format (Advance ...
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900 SERIES™ I NTRODUCTION Y our 900 Series™ Ultra Wide Screen Fishing S ystem comes in several differen t configurations. See the following list of products , all of which are covered by this manual, to find your 900 Series™ configuration: NOTE: Only the 987c SI Combo model c omes with GPS and built-in cartography . • Humminbird® 981c SI: ...
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2 GPS AN D CARTOGRAPHY (With 987c SI Combo models only) Y our 987c SI C ombo model uses GPS and sonar to determine your position, display it on a grid, and provide detailed underwater information. The Global P ositioning System (GPS) is a satellit e navigation system designed and maintained by the U.S . Department of Defense. GPS was originally int ...
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Use the illustration to locate the position of the MMC and SD slot c over , remove the cover , and then insert an MMC and/ or an SD card into one or both slots - either slot can accept either an MMC or an SD card. The label on both types of cards should face down and away from you so that y ou’re looking at the back of the card. Press down on the ...
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Humminbird ] 981 - page 10
4 Inside the boat there is often a c hannel or conduit used for other wiring, this can be used to route cables. Be sur e to route the cable as far as practical from the antenna cable of VHF radios or tachometer cables to reduce the possibility of in terference. The transducer and GPS receiver cables should not be cut, and care should be used not to ...
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Humminbird ] 981 - page 11
GIMBAL MOUNTING TH E CONTROL HEAD If you are gimbal mounting the Humminbird® 900 Series™, you can pre-assemble the unit in order to plan the best mounting location. Parts and tools specific to gimbal mounting are: • Gimbal mounting brack et and screws • Gimbal mounting knobs and washers • Phillips head screwdriver • 5 /16" (8mm) soc ...
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Humminbird ] 981 - page 12
6 5. Set the gimbal brack et aside and drill the four mounting screw holes using a 5 /32" (4.0 mm) drill bit. 6a. If the cables must pass through a hole directly beneath the mounting brac ket, mark and drill an additional 1" (25 mm) hole centered between the four mounting holes. Route the cables through the gr ommet, then press the grom- ...
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Humminbird ] 981 - page 13
8. Insert cable connectors into the proper r ecesses on the cable collector insert. The cable connectors are k eyed to prevent reverse installation, so be careful not to force the connect ors into the wrong slots. If you don’t have a cable f or ever y hole in the insert, install the blank plugs to protect the contr ol head from the weather . Cabl ...
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Humminbird ] 981 - page 14
8 9 . While holding cables in place in the cable collector insert, thread the cables through the slot in the bott om of the cable collector cover , line up the cable collector insert and cover , then slide the cover in to place on the insert. NOTE: T ab on cable collector insert goes into slot on cover . 10 . Attac h the cable collector insert to t ...
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Humminbird ] 981 - page 15
5. Inser t the contr ol head through the mounting hole from the front side of the dash. From the back side of the dash, align the two thr eaded rods on the rear of the housing with the two holes on the in- dash mounting bracket. Place a washer onto eac h threaded rod, then secure bracket by placing a wing nut on to each threaded rod and tigh ten fu ...
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Humminbird ] 981 - page 16
10 CONNECTING TH E CONTROL HEAD POWER CABLE TO THE BO A T A 6' (2 m) long power cable is included to supply power to the c ontrol head. Y ou may shorten or lengthen the cable using 18 gauge multi- stranded copper wire. CAUTION: Some boats have 24 or 36 V olt electric systems, but the control head MUS T be connected to a 12 VDC power supply . T ...
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Humminbird ] 981 - page 17
TRANSDUCER INST ALLA TION There are two diff erent installation methods for your transducer: • T ransom T ransducer • T rolling Motor T ransducer . Find the section that describes the method of installation you will be using. T ransducer Position Correct transducer position Incorrect transducer position, interfering with the side beams Motor Po ...
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Humminbird ] 981 - page 18
12 NOTE: R ough seas also can affect the readings of the Side Imaging transducer . NOTE: The transducer must be moun ted at least 15” from the propeller to avoid interference from the motor . NOTE: If the included transducer will not work f or your application, you may exchange it, NEW and UNASSEMBLED, with moun ting hardware included, for a tran ...
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Humminbird ] 981 - page 19
1. First, determine the best location on the transom to install the transducer . Consider the following t o find the best location: • It is very important to locate the transducer in an area which is r elatively free of turbulent water . As a boat moves thr ough the water , turbulence is generated by the weight of the boat, and the thrust of the ...
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14 5. Align the metal mounting brac ket with the mounting holes. The center slot should be above the two outer slots. (This brack et and all other hardware supplied is top quality stainless steel for maximum strength and corrosion pr otection.) Inser t the three 1" (25 mm) flat head wood screws into the drilled holes , but do not completely ti ...
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Humminbird ] 981 - page 21
T o adjust the running position of the tr ansducer: The transducer mounting brack et allows height and tilt adjustment, while the pivot bolt allows angular adjustment. These adjustments will help reduce cavitation. Initially , adjust the transducer as described in the following paragraphs. Further adjustment may be necessary to refine the installat ...
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Humminbird ] 981 - page 22
16 2. If you will be routing the cable through a hole in the transom, drill a 5 /8" diameter (16 mm) hole above the waterline. Rout e the cable through this hole, then fill the hole with marine- grade silicone sealant and proceed t o the next step immediately . 3. Place the escutcheon plate o ver the cable hole and use it as a guide to mark th ...
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Humminbird ] 981 - page 23
TES T AND FI NISH TH E TRANSDUCER I NS T ALLA TION When you have installed both the control head, the transducer , and accessories and have routed all the cables , you must per form a final test before loc king the transducer in place. T esting should be per formed with the boat in the water , although you can initially confirm basic operation with ...
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Humminbird ] 981 - page 24
18 GPS RECEIVE R INST ALLA TION (987c SI Combo models only) NOTE: Y ou will only need to per form this procedure if you have a GPS Receiver . T o optimize per formance of the GPS receiver , mount it in an area that has full e xposure to the sky . The ef fective area of reception is 10 ° above the horizon. Diff erent circumstances determine the mou ...
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Humminbird ] 981 - page 25
AC CESS UN DER MOUNTI NG LOCA TION Follow these steps to dec k mount the GPS receiver when routing the cable down through the mounting location: 1. Det ermine the best location, then test route the 20' (6 m) cable from the mounting location to the con trol head. NOTE: Installation details may vary with unit configuration. 2. Mark the mounting ...
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Humminbird ] 981 - page 26
20 FIN ISH ROUTING THE CAB LE AND CHECK GPS RECEIVE R OPERA TION Aft er installing a GPS receiver , you should per form the following procedur e to finish routing the GPS cable to the c ontrol head and to chec k to make sure that the con trol head is working correctly . 1. Secur e the cable along its path to the control head as needed with cable ti ...
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Humminbird ] 981 - page 27
The Speed accessory incorporates a paddlewheel-type speed sensor in a high-impact plastic housing. The module is intended for installation on the transom, and will work well on almost any boat. In addition to the parts supplied, you will need a hand drill with various bits, marine- grade silicone sealant, and a Phillips head screwdriver . Install t ...
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Humminbird ] 981 - page 28
22 2. Clean the paddlewheel by disengaging the axial clip from the housing wedge and rotating it forward. Once you have rotated the axial clip, r emove it from the housing by sliding it away from the holes in the housing. 3. Clean the removed paddlewheel with a mild solution of biodegradable soap or hot water . Clean the wheel well of debris and/ o ...
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Humminbird ] 981 - page 29
GETTING ST ARTE D - USING Y OUR 900 SE RIES™ Y our 900 Series™ Fishing Syst em user interface is easy to use. A combination of keys , differ ent views, and situation-specific, customizable menus allows you to control what you see on the color display . Ref er to the following illustration, and see K ey Functions , Views , and The Menu System fo ...
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24 WHA T ’S ON THE SONAR DISPLA Y The 900 Series™ can display a variety of useful information about the area under and adjacent t o your boat, including the following items: Sonar Color Bar - color spectrum indicating low to high sonar intensity returns, where red indicates high intensity and white indicates low intensity . Depth - water depth; ...
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Humminbird ] 981 - page 31
UNDE RS T ANDI NG SONAR HIST ORY It is important to understand the significance of the 900 Series™ display . The display does NO T show a literal 3- dimensional representation of what is under the wat er . Each vertical band of data received by the control head and plot ted on the display represents something that was detected by a sonar r eturn ...
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Humminbird ] 981 - page 32
26 WhiteLine® highlights the strongest sonar returns in whit e, resulting in a distinctive outline. This has the benefit of clearly defining the bott om on the display . UNDE RS T ANDI NG SIDE IMAGING It is important to understand how Side Imaging technology produces the display available on the 900 Series™. The images you see on the display are ...
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Humminbird ] 981 - page 33
WHA T ’S ON THE SIDE IMAGING DISPLA Y Side Imaging displays a number of easily recognizable featur es that allow for accurate interpretation of bot tom cont our and str uc ture. For Side Imaging, the bottom c omposition determines the intensity of the sonar return. F or example, rock and gravel pro vide a clearer sonar return than mud and sand be ...
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Humminbird ] 981 - page 34
28 SIDE IMAGING TECH NOLOGY: HOW IT W ORKS Side Imaging sonar uses two very precise sonar beams that are directed to either side of the boat and “illuminate ” the bottom c ontour , structure, and fish, and display results in a “picture-like ” image. • Side beams are extremely narr ow from front to bac k, and provide “thin slices” of t ...
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Humminbird ] 981 - page 35
Submerged Bridge: A Closer Perspective Submerged Bridge 1 1 Submerged Bridge, Alternative Perspective Submerged Bridge 1 1 Submerged Bridge, Creek Channel and New Bridge Piling New bridge pilings 1 Creek channel 2 1 Submerged Ravine with Timber Possible drop off 1 Submerged timber 2 1 Submerged tree 3 Submerged ravine 4 Submerged bridge 3 2 3 2 3 4 ...
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30 Submerged Barge with Dumped Logs Dumped logs 1 1 Submerged barge 2 2 Submerged Standing and Fallen Timber , Plus Bait Fish Bait fish 1 1 Submerged Swimming Pool Swimming pool 1 1 Standing and fallen timber 2 2 98x_Manual_531376-1_A.qxd 2/23/2005 11:40 AM Page 36 ...
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KEY FUNCTIONS Y our 900 Series™ user interface consists of a set of eas y-to-use keys that work with various on-screen views and menus to give you flexibility and contr ol over your fishing experience. Regardless of model, your contr ol head will have the following common keys: • POWER/LIGHT key • EXIT key • VIEW key • 4-W A Y Cursor Cont ...
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Humminbird ] 981 - page 38
32 temporarily , and the screen will update if it is af fected by your menu setting c hange, allowing you to see the eff ects of your ac tion immediately . Reactivate the X -Press™ Menu by using the UP or DOWN Cursor keys. Main Menu - Press the MENU key twice for the tabbed Main Menu S ystem. The Main Menu System is organized under tabbed heading ...
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Humminbird ] 981 - page 39
If the cursor is not active, the following menu will be displayed. Use the 4-W A Y Cursor C ontrol key to select Nearest Port, Nearest Tide Station or Nearest Current Station, then use the RIGHT Cursor key t o display the requested information. NOTE: The built -in UniMap™ does not contain Port, Tide or Current information. This information is onl ...
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Humminbird ] 981 - page 40
34 VIEWS AN D READOUTS All views have an Information Bar on the left side of the screen, c onsisting of readouts that are stack ed ver tically , and that change from view t o view . Y ou can customize the information displayed in individual readouts on many views, including suppr essing a particular readout so that nothing is displayed; the ability ...
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Humminbird ] 981 - page 41
SONAR ZOOM VIEW Sonar Zoom View increases the displayed resolution t o separate sonar returns that are very close together , such as those caused by fish suspended close to the bot tom or within structure. In Zoom View , the display is split t o show a narrow slice of the full range view on the right and the zoomed view on the left. The full range ...
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Humminbird ] 981 - page 42
36 SPLIT SONAR VIEW Split Sonar View displays sonar returns from the 50 kHz wide beam on the left side of the screen and displays sonar returns from the 200 kHz narr ow beam on the right side of the screen. Y ou can use the Split Sonar View t o make side by side comparisons between the sonar returns from the 50 kHz wide beam and the 200 kHz narrow ...
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Humminbird ] 981 - page 43
SIDE/SONAR COMBO VIEW Side/Sonar Combo View shows regular sonar inf ormation and side imaging sonar information in a combination split screen. Y ou can per form any of the functions for either of these views, but only when the view you want t o control is selected as the active side (see Sonar X-Press™ Menu: Active Side or Side Imaging X -Press? ...
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Humminbird ] 981 - page 44
38 BIRD’S EYE VIEW (987c SI Combo models only) Bird's Eye View shows a 3D perspective view of the track and the c har t land cont our from a point above and behind the boat (the eye poin t). As the boat turns, the eye point moves to f ollow the boat. Big Digits on this view provide digital data in a large, easy-to-see format. When you press ...
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Humminbird ] 981 - page 45
CHART VIEW (987c SI Combo models only) Chart View shows car tography from the built -in UniMap™ or an optional MMC map for the area surrounding your curren t position. The current track (also known as the position history or breadcrumb trail) showing where the boat has been, along with saved tracks , waypoints, and the current route (when navigat ...
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Humminbird ] 981 - page 46
40 CHART /SIDE COMBO VIEW (987c SI Combo models only) Chart/Side Combo View shows regular chart information and side imaging sonar information in a combination split screen. Y ou can per form any of the functions for either of these views, but only when the view you want t o control is selected as the active side (see Navigation X-Press™ Menu: Ac ...
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Humminbird ] 981 - page 47
Zooming: Use the Plus (+) key to Z oom In and the Minus (-) key to Z oom Out showing the cartography at differen t scales. The scale is indicated on the left side of the display . If you zoom in beyond the available chart data, the display will go int o Overzoom mode whereby the last available chart data is amplified to reflect the scale selected. ...
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Humminbird ] 981 - page 48
42 W A YPOINTS, ROUTES AN D TRACKS (987c SI Combo models only) Wa ypoints are stored positions that allow you to mark ar eas of interest or navigation points. Y our 900 Series™ can st ore up to 3000 waypoints. Routes link two or more waypoints t ogether to create a path for navigation, and are used in trip planning. Y ou can link individual waypo ...
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Humminbird ] 981 - page 49
Display the W aypoints Submenu: From any view , press the MENU key twice to display the Main Menu System, then use the RIGHT Cursor k ey to select the Navigation tab. Select Waypoin ts and press the RIGHT Cursor key to display the W aypoints submenu. Program a specific position as a waypoint: T o create a waypoint that is NO T your current position ...
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Humminbird ] 981 - page 50
44 ADD A W A YPOINT T ARGET OR TROLLI NG GRID (987c SI Combo models only) Add or Remove a W aypoint T arget: From the W aypoints submenu (accessed from the Navigation main menu), select T arget and press the RIGHT Cursor k ey to display a list of waypoints. Select the waypoint you want to target. A tar get consisting of concentric circles centered ...
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Humminbird ] 981 - page 51
SA VE, EDIT OR DELETE A ROUTE (987c SI Combo models only) Save the current route: While you ar e navigating , the current route can be saved. From the Navigation X -Press™ Menu, select Save Current Route and press the RIGHT Cursor key . Navigation will continue. Display the Routes submenu: Fr om any view , press the MENU key twice to display the ...
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Humminbird ] 981 - page 52
46 THE ME NU SY STEM The menu system is divided int o easy-to-use menu modules. The main components of the menu system are: Start-Up Options Menu: Press the MENU key during the power up sequence t o view the Start-Up Options menu. See Start -Up Options Menu . X-Press™ Menu: The X -Press™ Menu allows you to access the settings that ar e changed ...
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Humminbird ] 981 - page 53
T otal Screen Updat e: when you change any menu settings that af fect the Sonar View , the view will update immediately (i.e. you don ’t have to exit the menu to apply the change to the screen). S T ART -UP OPTIONS ME NU Press the MENU key when the Title screen is displayed t o access the Star t -Up Options menu. Use the UP or DOWN 4-W A Y Cursor ...
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Humminbird ] 981 - page 54
48 NORMAL OPERA TION Use Normal operation for on the water operation with a transducer connected. In addition, your 900 Series™ uses advanced transducer detection methods to determine if a transducer is connected. If a functioning transducer is connected, Normal operation will be selected automatically at power up and your 900 Series™ can be us ...
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Humminbird ] 981 - page 55
AC CESSORY TES T Accessory T est lists the accessories connected t o the system. NOTE: The speed accessor y will be detected only if the paddlewheel has moved since your 900 Series™ was powered up. GPS DIAGNOS TIC VIEW (987c SI Combo models only) GPS Diagnostic View , which is only available when a GPS Receiver is at tached to you 900 Series, sho ...
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Humminbird ] 981 - page 56
50 SONAR X -PRESS™ ME NU The Sonar X-Press™ Menu provides access t o the settings most fr equently used. Press the MENU key once while in any of the Sonar Views to access the Sonar X -Press™ Menu. NOTE: Menu choices will vary depending on system settings suc h as whether the unit is set for Advanced User mode. NOTE : The Zoom L evel menu opti ...
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Humminbird ] 981 - page 57
SENSITIVITY Sensitivity controls how muc h detail is shown on the display . Increasing the sensitivity shows more sonar returns fr om small baitfish and suspended debris in the water; however , the display may become too clut tered. When operating in very clear water or greater depths, increased sensitivity shows weak er returns that may be of inte ...
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Humminbird ] 981 - page 58
52 LOWER RANGE Lower Range sets the deepest depth range that will be displayed. Automatic is the default set ting. When in automatic mode, the lower range will be adjusted by the unit to follow the bot tom. Selecting a specific set ting locks the depth range int o Manual mode. Use both Upper and Lower Range together to view a specific depth range m ...
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Humminbird ] 981 - page 59
BOTT OM LOCK (Sonar Zoom View only) Bott om Lock changes the mode of the Zoomed view in the Sonar Z oom View . T o turn on Bot t om L ock: 1. In the Sonar Zoom View , highlight Bot tom Loc k on the Sonar X-Pr ess™ Menu. 2. Use the LEFT or RIGHT 4-W A Y Cursor Control keys t o change the Bott om Lock setting t o on. (O ff , On, Default = Off ) BOT ...
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Humminbird ] 981 - page 60
54 SIDE IMAGING X-PRESS™ MENU (Side Imaging Views only) The Side Imaging X-Press™ Menu pr ovides access to the set tings most frequently-used. Press the MENU key once while in any of the Sonar Views to access the Side Imaging X -Press™ Menu. ACTIVE SIDE Active Side allows you to select which side of a Combo View will be active; key presses wi ...
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Humminbird ] 981 - page 61
SI SIDE SI Side sets which transducer beam from the SI beams will be shown on the display . T o Adjust SI Side: 1. Highlight SI Side on the Side Imaging X-Pr ess™ Menu. 2. Use the RIGHT 4-W A Y Cursor Control key t o select the transducer beam (Left, Right, Both, Default = Both) SI SENSITIVITY SI Sensitivity controls how muc h detail is shown on ...
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56 SI COL ORS SI Colors allows you to select which c olor palette you would like to use f or the display . T o c hang e the SI C olors: 1. Highlight SI Colors on the Side Imaging X -Press™menu. 2. Use the LEFT or RIGHT 4-W A Y Cursor Con trol keys to c hange the color palette. (Inverse, Gray , Green, Blue, Default = In verse) NA VIGA TION X-PRESS ...
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Humminbird ] 981 - page 63
ACTIVE SIDE Active Side allows you to select which side of a Combo View will be active; key presses will only af fect the active side of the screen. When a menu is displayed, the non-active side of the screen will be grayed out; at any other time, a green arrow will point t o the active side. Combo Views usually display sonar on the left, with char ...
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Humminbird ] 981 - page 64
58 SA VE CURRENT ROUTE (Only when navigating) Save Current Route allows you t o save the current route being displayed. This menu choice will only appear when you are currently navigating a r oute. T o Sa v e C urr en t R oute: 1. Highlight Save Current Route on the Navigation X -Press™ Menu. 2. Use the RIGHT 4-W A Y Cursor C ontrol key to initia ...
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Humminbird ] 981 - page 65
REMOVE GRID (Only if a Grid is active) Remove Grid r emoves the waypoint grid from the display . This menu choice will only appear when a grid has already been applied to a waypoint. T o R emo v e a Grid: 1. Highligh t Remove Grid on the Navigation X-Press™ Menu. 2. Use the RIGHT 4-W A Y Cursor C ontrol key t o remove the grid. SONAR MEN U T AB P ...
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Humminbird ] 981 - page 66
60 BEAM SELECT Beam Select sets which sonar returns from the transducer will be displayed on the screen. When set to 200 /50 kHz , the returns from both beams are blended. The Split Sonar View continues to display the sonar r eturns from each beam in their respective windows. The blended information is shown in the Sonar View . The RTS® Window in ...
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Humminbird ] 981 - page 67
When Fish ID+™ is turned off , the 900 Series™ shows only the raw sonar returns on the display . These returns will oft en result in "arches" forming on the display , indicating potential targets. Due t o the transducer beam angle, the distance to a fish decreases as the fish moves into the beam, and then incr eases as it moves out ag ...
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62 T o c hang e the R TS® Window set ting: 1. Highlight R TS Window on the Sonar main menu. 2. Use the LEFT or RIGHT 4-W A Y Cursor C ontrol keys to c hange the RTS® Window set ting . (Wide, Narrow , Off , Default = Narrow) BOTT OM VIEW Bott om View selects the method used to represent bot tom and structure on the display . Structure ID® represe ...
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Humminbird ] 981 - page 69
50 KHZ SENSITIVITY (Advanced) 50 kHz Sensitivity changes the sensitivity of the 50 kHz beam. Increasing the 50 kHz Sensitivity will display additional weak returns and decreasing the 50 kHz Sensitivity will display fewer weak returns. The 50 kHz Sensitivity menu choice is only av ailable when User Mode is set to Advanced (see Setup Menu T ab: User ...
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Humminbird ] 981 - page 70
64 MAX DEPTH (Advanced) Max Depth adjusts the maximum depth of operation. The performance of your 900 Series™ can be tuned to the maximum depth you will be fishing in by set ting the Max Depth. When a maximum depth is set, your 900 Series™ will not att empt to acquire sonar data below that depth, thus increasing overall performance. When Max De ...
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Humminbird ] 981 - page 71
TEMPERA TURE GRAPH (Sonar View only , with T emperature input) T emper ature Graph allows you to display or suppress a water temperature graph o ver the main Sonar View to show temperature c hanges correlated to recent sonar hist ory . T o c hang e the display of the T emper a tur e Graph: 1. In the Sonar View, highligh t T emperature Graph on the ...
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Humminbird ] 981 - page 72
66 TRACKS Tr a c k s allows you to view the T racks submenu. T o view the T r ac k s Submenu: 1. Highlight T racks on the Navigation main menu. 2. Use the RIGHT 4-W A Y Cursor C ontrol keys t o view the T racks submenu. The T r ac k s Submenu c on tains the following menu c hoices: Edit allows you to select a previously-saved track and edit its nam ...
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Humminbird ] 981 - page 73
CHART ORIENT A TION Chart Orientation allows you to select whether views containing c har ts should be drawn North-Up or Course-Up. T o c hang e the Char t Orien ta tion setting: 1. Highlight Char t Orientation on the Navigation main menu. 2. Use the LEFT or RIGHT 4-WA Y Cursor Control k eys to change the Chart Orientation set ting. (Nor th-Up, Cou ...
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Humminbird ] 981 - page 74
68 TRACK MIN DIS T ANCE (Advanced) T rack Min Distance allows you to set a minimum distance of travel befor e a trackpoint is added to the track. NOTE: T rac k Min Distance works in conjunction with T rackpoint Interval. Both c onditions must be met before a trackpoint is added t o the current track. T o c hang e the T r ac k Minimum Distanc e sett ...
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Humminbird ] 981 - page 75
CHART MEN U T AB (987c SI Combo Models only) Press the MENU key twice to access the Main Menu System and then press the RIGHT Cursor key to select the Chart tab. NOTE: Menu c hoices will vary depending on system settings suc h as whether the unit is set for Advanced User mode. NOTE: This menu tab only appears on 98 7c SI Combo models. CHART DET AIL ...
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Humminbird ] 981 - page 76
70 LA T /L ON GRID Lat/Lon Grid allows you to display or hide a grid showing latitude and longitude lines. T o c hang e the La t/L on Grid set ting: 1. Highlight Lat/Lon Grid on the Navigation main menu. 2. Use the LEFT or RIGHT 4-W A Y Cursor C ontrol keys t o change the Lat/Lon Grid setting. (Hidden, Visible, Default = Hidden) SPOT SOUNDINGS Spot ...
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Humminbird ] 981 - page 77
SET MAP OFFSET (Advanced) Set Map Offset allows you to change the map of fset used by the 900 Series™. NOTE: The Map Offset will be applied to all maps and not just the map that requires the correction. The Map Offset should be cleared if a different map is t o be used. T o c hang e the Map O f fset set ting: 1. Ac tivate the cursor and move it l ...
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Humminbird ] 981 - page 78
72 DEPTH ALARM Depth Alarm sounds when the depth becomes equal to or less than the menu set ting. T o c hang e the Depth Alarm setting: 1. Highlight Depth Alarm on the Alarms main menu. 2. Use the LEFT or RIGHT 4-W A Y Cursor Con trol keys to c hange the Depth Alarm setting. (OFF , 1 to 100 feet, or 0 .5 to 30 meters [International Models Only] , D ...
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Humminbird ] 981 - page 79
OFF COURSE ALARM (987c SI Combo Models only) Off Course Alarm sounds when the boat has moved too far of f course based on the menu setting when navigating. Off Course Alarm allows you t o set how far the boat is allowed to move of f course before the Off Course Alarm will sound. T o c hang e the O f f Course Alarm set ting: 1. Highlight O ff C ours ...
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Humminbird ] 981 - page 80
74 ALARM TONE Alarm T one selects the pitch of the alarm sound. A brief tone will be produced as you adjust the Alarm T one so that you can select the tone that you can hear best. T o c hang e the Alarm T one set ting: 1. Highlight Alarm T one on the Alarms main menu. 2. Use the LEFT or RIGHT 4-W A Y Cursor C ontrol keys to c hange the Alarm T one ...
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Humminbird ] 981 - page 81
UNITS - DE PTH Units - Depth selects the units of measure for all depth-related readouts. T o c hang e the Units - Depth setting: 1. Highlight Units - Depth on the Setup menu. 2. Use the LEFT or RIGHT 4-WA Y Cursor Control k eys to change the Units - Depth setting. (Meters [Int ernational Models Only] , Feet, Fathoms; Default is Meters for Internat ...
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Humminbird ] 981 - page 82
76 USER MODE User Mode sets the menu system to either Normal or Advanced. When set to Normal, only the basic menu options are shown. When set to Advanced (default set ting), additional menu choices are available. T o c hang e the User Mode setting: 1. Highlight User Mode on the Setup menu. 2. Use the LEFT or RIGHT 4-W A Y Cursor C ontrol keys t o c ...
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Humminbird ] 981 - page 83
SELECT READOUTS (Advanced) Select Readouts allows you to customize the information displayed in individual digital readouts on the left side of many views, including suppressing a particular readout so that nothing is displayed; the ability to customize readouts depends on the view and whether you are navigating. This Advanced feature allows you t ...
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Humminbird ] 981 - page 84
78 . T o Select Readouts: 1. Make sure you are in Advanced User Mode, then highlight Select Readouts on the Setup main menu. 2. Use the RIGHT 4-W A Y Cursor C ontrol key to initiat e this procedure. 3. The Select Readouts submenu will appear, showing a list of all Readouts. Use the UP or DOWN Cursor keys t o selec t a particular Readout position, t ...
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Humminbird ] 981 - page 85
SPEED CALI BRA TION (Advanced, Speed Paddlewheel only) Speed Calibration will adjust the speed readout by the percentage ent ered, and will appear in the menu if a Speed Accessory is connected and the paddlewheel has moved at least once, when the unit is in Advanced User Mode (see Setup Menu T ab: User Mode .) T o c hang e the Speed C alibr a tion ...
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Humminbird ] 981 - page 86
80 TIME FORMA T (Advanced, 987c SI Combo models, International only) Time Format changes the time format used by the unit This menu c hoice is available only when in Advanced User Mode (see Setup Menu T ab: User Mode. ) International Models Only . Time Format selects a 12 hour or 24 hour format f or the time of day displayed when Time + Date is sel ...
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Humminbird ] 981 - page 87
SONAR (987c SI Combo models only) Sonar deactivates Sonar and removes the Sonar Views from the view rotation. T o turn Sonar on or off: 1. Highlight Sonar on the Setup menu. 2. Use the LEFT or RIGHT 4-WA Y Cursor Control k eys to change the Sonar to On or Off (Off , On, Default = On). VIEWS ME NU T AB From any view , press the MENU key twice t o ac ...
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Humminbird ] 981 - page 88
82 AC CESSORIES M ENU T AB From any view , press the MENU key twice t o access the tabbed Main Menu System, then press the RIGHT cursor key until the Accessories tab is selected. If no accessories are at tached to the Accessory Bus, no menu choices will appear under the Accessories tab. If an accessory is at tached, however , additional menu choice ...
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Humminbird ] 981 - page 89
DISPLA Y PROBLEMS There are several main conditions or sources of possible int er ference that may cause pr oblems with the quality of the information displayed on the control head. Look in the following table for some sympt oms of display problems and possible solutions: Problem Possible Cause The control head loses power at high speeds. When the ...
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Humminbird ] 981 - page 90
84 FIN DING THE CAUSE OF NOISE Electrical noise usually affects the display with many black dots at high speeds , and high sensitivity readings. One or more of the following sources can cause noise or int er ference: Possible Source of Noise Isolation Other electronic devices The boat’ s engine Cavitation from the boat’ s propeller T urn off an ...
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Humminbird ] 981 - page 91
1- YEAR LIMITED WARRANTY We warran t the original retail purchaser that products made by Humminbird® have been manufactured free from defects in materials and workmanship. This warran ty is effective for one year fr om the date of original retail purchase. Humminbird® products found to be defective and c overed by this warranty will be replaced o ...
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Humminbird ] 981 - page 92
86 RETURNI NG Y OUR UN IT FOR SERVICE Before sending your unit in for repair , please c ontact the fac tory , either by phone or by email, to obtain a Repair Authorization Number for your unit. Please have your product model name and serial number available before calling the factory . If you contact the factory by e-mail, please include your produ ...
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Humminbird ] 981 - page 93
SPECIFICA TIONS Depth Capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2500 ft (780 m) * Side imaging is available up to 100 ft (30 m) of ...
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Humminbird ] 981 - page 94
88 APPENDIX A T ransducer Mounting T emplate: XHS-9-SI- 160-T 98x_Manual_531376-1_A.qxd 2/23/2005 11:41 AM Page 94 ...
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Humminbird ] 981 - page 95
Contact Humminbird® Contact the Humminbird® Customer Resource C enter in any of the following ways: By T elephone (Monday - Friday 8:00 a.m. to 4:30 p.m. C entral Standard Time): 1-800- 633- 1468 By e-mail (typically we respond to your e-mail within three business days ): custserv@johnsonoutdoors.com For direct shipping, our address is: Humminbir ...
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