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Overview: The Garmin GPSMAP 78 is a hand-held GPS designed
for use on or near the water. This IPX7 waterproof navigator includes a worldwide basemap. It also has a microSD card slot for optional maps, such
as detailed coastal charts, or topographical or highway maps for your travels on land. It is powered by two "AA"
batteries (not included).
GPS Receiver: The unit has a high-sensitivity, WAAS-enabled
GPS receiver which lets you quickly locate your precise location within 10-to-16
feet. HotFix satellite prediction helps the unit maintain your GPS location,
even when your overhead view is restricted.
Compass/Altimeter: The GPSMAP 78 is equipped with an
electronic compass that is accurate to within 2 degrees. The
bearing pointer appears as a red arrow at the top of the compass screen when you
are traveling directly toward your destination.
Display: The device has a 2.6" vertically-oriented, 160 x
240-pixel, backlit TFT 65K color display. It is not a touchscreen display.
Included Maps: The GPSMAP 78 comes with the worldwide DEM basemap. You can
purchase additional maps on microSD cards, such as BlueChart g2 coastal maps, City Navigator NT to give
you turn-by-turn routing on roads or topographical maps for exploring on land.
Geocaches: If you are active in Geocaching, you can connect
the unit to the Internet via your computer and download the coordinates. The
unit has a Geocaches menu position where you can find your downloaded Geocaches
and navigate to them.
Data Storage: The unit has a built-in memory of
approximately 1.7 GB. A microSD card slot is provided inside the battery
compartment for additional maps or data storage.
Water Resistance: The GPSMAP 78 is designed for use on or
near the water. It is made of high-impact plastic alloy, so it can withstand
rough treatment. The rubberized side grips let you keep a firm grasp of the
device, even in wet conditions. The fully-gasketed navigator meet IPX7
standards, and is waterproof to withstand accidental immersion in one meter of
water for up to 30 minutes.
Power Requirements: The GPSMAP 78 operates on alkaline,
Lithium, or rechargeable Ni-MH batteries. Alkaline batteries can fail in
temperature extremes, and it is recommended that Lithium batteries be used in
below-freezing temperatures. Battery life is approximately 20 hours with typical
Connections: The unit has three connectors under a
- MCX: The MCX connector allows you to connect an
external GPS antenna, such as the
GA 25MCX Low Profile GPS antenna.
- USB: The Mini-B 2.0 USB port lets you connect to your
computer with the supplied USB cable.
- Serial Port: This 4-pin serial port is designed
specifically for use with the Garmin A/C PC Adapter (item 010-10277-00). It
connects the device to A/C power and to your computer.
Additional Tools: For convenience, the GPSMAP 78 has
several tools that you can use:
- Calendar: for checking dates at a glance
- Calculator: for calculating basic math functions
- Sun and Moon: displays sunrise and sunset times, and
- Alarm Clock: you can set an audible alarm, or to turn
the device on at a specific time
- Hunt and Fish: displays the predicted best dates and
times for hunting and fishing at your current location
- Stopwatch: perform basic stopwatch functions, including
marking and timing laps
- Waypoint Averaging: allows you to refine a waypoint
location with multiple samples for the most accurate location