User manual GARMIN GPSMAP 420S

[. . . ] GPSMAP 400 series owner's manual © 2007 Garmin Ltd. or its subsidiaries Garmin International, Inc. 1200 East 151st Street, Olathe, Kansas 66062, USA Tel. (913) 397. 8200 or (800) 800. 1020 Fax (913) 397. 8282 Garmin (Europe) Ltd. [. . . ] DSC--turn DSC (Digital Selective Calling) on or off. NOTE: ToconfigureAISorDSCinformationforotherboats, your unit must be connected to an external AIS or DSC device. See page 30 for more information. Safe Zone--turn a safe zone around your boat on or off. This is used for collision avoidance, and can be customized: · Ring--show or hide a ring on the map showing the safe zone for your boat. · Range--change the measured radius of the safe zone ring to a specifieddistancefrom0. 1to2. 0nm(or. 02to5. 0km, or0. 1 to 2. 0 mi). · Time to--sounds an alarm if AIS determines that a target willintersecttheSafeZonewithinthedefinedtimeinterval (ranging from 3 to 24 minutes). 34 GPSMAP® 400 Series Owner's Manual uSInG Sonar usInG sonar When connected to a transducer, your unit becomes a powerful fishfinder/flasher. Ifyourunitdoesnothaveabuilt-insounder, you can connect a Garmin GSD 21 or GSD 22 sounder module to your unit to use the sonar features. Understanding the Flasher Understanding the Full Screen The Flasher screen (dual beam transducer only) provides an almost instantaneous return of what is below your boat. The depth scale is organized as a ring that starts at the top, or 12:00, and progresses clockwise. Sonarinformationflashesontheringwhenitisreceived at the depth indicated on the inside ring. Like the regular graph, the colors indicate different strengths of the sonar return. Toopentheflasher, fromtheHomescreen, select Sonar > Flasher. Water Temp Flasher ring Depth Select the Full Screen option to view a full-screen graph of the transducer's sonar readings. From the Home screen, select Sonar > Full Screen. Depth Temperature Speed Suspended targets Range Water speed Transducer frequency or beam width GPSMAP® 400 Series Owner's Manual 3 uSInG Sonar Understanding the Split Freq Screen Use the Split Freq screen (dual frequency transducer only) to view both the 50kHz and 200kHz frequencies on the same screen. A 50kHz frequency graph appears on the left; a 200kHz frequency graph appears on the right. To open the Split Freq screen, from the Home screen, select Sonar > Split Freq. Depth, temperature, and speed Understanding The Split Zoom Screen From the Home screen, select Sonar > Split Zoom. Depth, temperature, and speed Use the Split Zoom screen to view the full sonar data from the graph and a zoomed in portion on the same screen. Zoomed depth scale Range Zoom level Zoom window Range Transducer frequency or beam width Frequencies 3 GPSMAP® 400 Series Owner's Manual uSInG Sonar Understanding the Temp Log Screen If you are using a temperature-capable transducer, the Temp Log screen keeps a graphic log of temperature readings over time. The current temperature and depth are shown in the top-left corner. From the Home screen, select Sonar > Temp Log. Temp and depth Setting Up Sonar UsetheSonarSetupscreentodefineandadjustsettingsuniversalto all sonar screens. From the Home screen, select Sonar > Sonar Setup. This affects the background on all sonar screens, but does not change the Temp Log screen. Fish Symbols--set how the sonar interprets suspended targets. The unit does not interpret the sonar return data (default). Time elapsed Temp range Suspended targets appear as symbols. Background sonar informationappears, makingthedistinctionbetweenfish and structure easier. Suspended targets appear as symbols with background information shown. The target depth of each symbol is also indicated. Suspended targets appear as symbols with no background information shown. The target depth of each symbol is indicated. 3 The temperature appears along the right side and the time elapsed appears along the bottom. [. . . ] (913) 397-8200 or Southampton, Hampshire, SO40 9RB UK (800) 800-1020 Tel. +44 (0) 870. 8501241 (outside the UK) Fax (913) 397-8282 0808. 2380000 (within the UK) Fax +44 (0) 870. 8501251 Garmin Corporation No. 68, Jangshu 2nd Road, Shijr, Taipei County, Taiwan Tel. 886/2. 2642. 9199 Fax 886/2. 2642. 9099 appendIx FCC Compliance This product has been tested and found to comply with Part 15 of the FCC interference limits for Class B digital devices FOR HOME OR OFFICE USE. [. . . ]