User manual GARMIN GPSMAP 820

[. . . ] Unit 5, The Quadrangle, Abbey Park Industrial Estate, Romsey SO51 9DL, U. K. 44/1794. 519944 Fax 44/1794. 519222 Garmin Corporation No. 68, Jangshu 2nd Road, Shijr, Taipei County, Taiwan Tel. 886/2. 2642. 9199 Fax 886/2. 2642. 9099 All Rights Reserved. [. . . ] TracBack routes are created by reducing your track log into a route of up to 50 turns and activating an inverted route along those points. Once activated, a TracBack route leads you back to the oldest stored track log point, so it's a good idea to clear the existing track log before you start your current trip. To clear the track log and define a starting point for a TracBack route: 1. Press MENU twice to display the Main Menu page. Using the ARROW KEYPAD, highlight the `Track' tab, then highlight the `Active' tab to the right. Use the ARROW KEYPAD to highlight `Erase' and press ENTER. Highlight `OK' and press ENTER. Highlight `Save' and press ENTER to save an active track log. 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. 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. Use the ARROW KEYPAD to select `Save' and press ENTER. On the `Save Back Through' window, highlight the desired time, date, or `Entire Log' and press ENTER. Next, the track will begin saving and then display the `Saved Track' window when done. Press the NAV key, highlight `Stop Navigation' and press ENTER. 56 Creating a Route Reference Creating a Route The last way to navigate to a destination is to create a user-defined route. The Garmin GPSMAP 188/188C/238 Sounder lets you create and store up to 50 reversible routes (numbered 1-50), with up to 254 waypoints each. The first way is by selecting points from the Map Page, allowing you to see each route graphically on-screen as you create the route. The second way is to select waypoints from the Find menu, allowing you to see a list of the route points as you create the route. To create a route, start by accessing the Main Menu. To create a route graphically: 1. Press the MENU key twice to display the Main Menu page. Use the ARROW KEYPAD to highlight the `Route' tab. Press the MENU key to display the route options page. Select `New Route' and press ENTER. Or, highlight the first available blank slot in the Route List and press ENTER. To add an existing waypoint or map item to the route, use the ARROW KEYPAD to highlight the desired waypoint or map item on screen and press ENTER. [. . . ] A thin whiteline indicates a softer bottom while a thick whiteline indicates a harder bottom. Normally, a red/dark line is used to show the point where water meets the bottom. This line will follow 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. [. . . ]