User manual GARMIN GPSMAP 178 SOUNDER

[. . . ] GPSMAP 178/178C chartplotter & depth-finder owner's manual © Copyright 2004 Garmin Ltd. Unit 5, The Quadrangle, Abbey Park Industrial Estate, Romsey, SO51 9DL, U. K. Except as expressly provided herein, no part of this manual may be reproduced, copied, transmitted, disseminated, downloaded or stored in any storage medium, for any purpose without the express prior written consent of Garmin. Garmin hereby grants permission to download a single copy of this manual onto a hard drive or other electronic storage medium to be viewed and to print one copy of this manual or of any revision hereto, provided that such electronic or printed copy of this manual must contain the complete text of this copyright notice and provided further that any unauthorized commercial distribution of this manual or any revision hereto is strictly prohibited. [. . . ] Highlight `OK' and press ENTER. You must first save the track log before you can use the `Follow Track' feature. The Save feature allows you to store up to 15 track logs from certain times and dates. Highlight `Save' and press ENTER to save an active track log. To save a track log: 1. From the Main Menu, use the ARROW KEYPAD to highlight the `Track' tab, then highlight the `Active' tab to the right. 54 2. On the `Save Back Through' window, highlight the desired time, date, or `Entire Log' and press ENTER. Next, the track begins saving and then display the `Saved Track' window when done. The default name, distance, and number of points (700 maximum) are displayed. To change the name of the saved track, highlight the name field and press ENTER, make your changes and press ENTER again. To choose a color that is used to display the saved track line, highlight the field and press ENTER, choose a Color and press ENTER again. To display the track on the Map and Highway pages, highlight the check box to the left of `Show on Map and Highway' and press ENTER. To view the track on the map, highlight `Review on Map' and press ENTER. Highlight `OK' and press ENTER to save the track. Reference TracBack Navigation Default Track name Total Distance Change color of track line Check this box to display track Total number of points To activate a TracBack using the NAV key: 1. Press the NAV key, then highlight the `Follow Track' option and press ENTER. Choose either `Original', which navigates you from the start to the end of your trip, or `Reverse', which navigates you from the end to the start of your trip and press ENTER. Once a TracBack has been activated, the GPSMAP 178/178C takes the track log currently stored in memory and divides it into segments called `legs'. Up to 50 temporary `turns' (BEGIN, TURN 1, TURN 2, TURN 3, . . . . , TURN X, END) are created to mark the most significant features of the track log in order to duplicate your exact path as closely as possible. To get the most out of the TracBack feature, remember the following tips: · Always clear the track log at the point that you want to go back to (dock, etc. ). · The `Record Mode' option on the track log setup page must be set to `Fill' or `Wrap'. · There must be at least two track log points stored in memory to create a TracBack route. You must first save a track before using the `Follow Track' option. If there are no saved tracks, the message "There are no saved Tracks to follow" appears after you select `Follow Track. ' 55 Reference TracBack Navigation/ MOB: Man OverBoard · If the track log interval is set to the `Time' option, the route may not follow your exact path (keep the interval set to `resolution' for best performance). · If the receiver is turned off or satellite coverage is lost during your trip, the TracBack draws a straight line between any point where coverage was lost and where it resumed. · If your track log's changes in distance and direction are too complex, 50 waypoints may not mark your path accurately. The receiver then assigns the 50 waypoints to the most significant points of your track, and simplifies segments with fewer changes in direction. To stop TracBack navigation: 1. Press the NAV key, highlight `Stop Navigation' and press ENTER. For more information on setting up the Track options and saved tracks, see page 75. MOB Key The MOB function allows you to quickly activate a course back to a location. The GPSMAP 178/178C's Man Over Board function (MOB) lets you simultaneously mark and set a course to a position for quick response to emergency situations. To activate the MOB function: 1. [. . . ] Normally, a red/dark line is used to show the point where water meets the bottom. This line follows the bottom contour, along with any significant objects lying on the bottom. The unit uses the whiteline function to make this bottom layer information easier to distinguish. With the GPSMAP 178/178C, active whiteline helps accentuate where strong signals are located, which make bottom type determination easier. [. . . ]