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Garmin Handheld Marine GPS
What distinguishes these GPS from other hand-held GPS (which could also very easily be used for marine purposes) is their ability to float.
Any hand-held GPS can be used as a marine GPS because they will all withstand being in water to the depth of a metre for up to 30 minutes.
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GPS 72H
The GPS 72H now has a high sensitive aerial and provides 1 MB of internal user memory to be used for storing downloaded Points of Interest data. It is preloaded with worldwide cities and nautical navigation aids such as lights, buoys, sound signals and day beacons.
Price: $265
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GPSMap 78
The GPSMAP 78 features crisp color mapping, high-sensitivity receiver, new molded rubber side grips, plus a microSD™ card slot for loading additional maps. And it floats.
Price: $505
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GPSMap 78s
The GPSMAP 78s features a 3-axis compass, barometric altimeter, crisp color mapping, high-sensitivity receiver, new molded rubber side grips, plus a microSD™ card slot for loading additional maps. And it floats.
Price: $605
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GPS Mapping
There are 3 types of mapping:
1. City Navigator
2. Topographic mapping
3. Bluecharts (marine)
GPS facts
The first GPS satellite was launched in March, 1978.
Each satellite weighs approximately 1,000 kilograms and is about 8 metres across with the solar panels extended.
Transmitter power is only 50 watts, or less!
GPS FAQ
All you ever wanted to know about GPS.
If you've got a question to which you can't find an answer, then email and ask us. We'll do our best to answer.
GPS Accuracy
The accuracy of a position determined with GPS depends on the type of receiver.
Most hand-held GPS units have about 8-15 metre accuracy.
When the system was created, timing errors were inserted into GPS transmissions to limit the accuracy of non-military GPS receivers to about 100 metres.
This part of GPS operations, called Selective Availability, was eliminated in October 2000.
GPSMap 60 / 78
Download an
GPSmap 60 / 78
series comparison.
(Requires Acrobat Reader)
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