A Review of the Garmin GPSMAP 78SC 2.6-Inch Waterproof Marine GPS and Chartplotter

The Garmin GPSMAP 78SC 2.6-Inch Waterproof Marine GPS and Chartplotter is marketed mainly for boaters and water sports aficionados. It can also be used inland as well, so that travellers who find themselves lost may find their way back to more familiar surroundings. It is an excellent choice that’s very affordable for the keen kayak fisher.


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Features of the handheld Garmin gpsmap 78sc.

  • The unit dimensions are 2.6″ x 6.0″ x 1.2″.garmin gpsmap 78sc
  • It weighs a little over 7½ ounces with the batteries installed.
  • The display comes in at 1.43″ x 2.15″, with a 160 x 240 pixel resolution.
  • It’s waterproof and it floats.
  • It has a base map and preloaded maps. It has preloaded U.S. coastal charts including details such as shorelines, nav-aids, depth contours, marinas, and harbors.
  • It also enables you to add maps. You can install more marine, topographic and road maps, which are available on microSD cards. The card slot is placed within the waterproof battery compartment, and you won’t have to worry about getting it wet.
  • It has an electronic compass that comes with a 3-axis tilt. This displays your heading quite accurately even when you are simply standing still.
  • It is equipped with a barometric altimeter which works in tracking pressure changes to determine your exact altitude. You can even use it to oversee and even anticipate changing weather conditions, by plotting the barometric pressure.

Pros and Cons:

The main advantages of the Garmin GPSMAP 78sc are quite clear: getting lost, for the most part, becomes a thing of the past. Plus, it can be used for both inland and offshore so you won’t have to buy separate equipment.


  1. The GPS receiver is extremely sensitive, even in deep canyons or heavy cover. You will always find your way no matter what.
  2. It is extremely compact and light.
  3. It’s waterproof and it floats, which makes it perfect for water sports. With the preloaded maps, exploring coastal areas becomes much safer and more convenient – perfect for the kayak fishing enthusiast.
  4. You can wirelessly share tracks, routes, waypoints, and other data to other similar units. You just need to press “send”.
  5. You can connect to a computer, which enables online sharing of data.
  6. The Garmin GPSMAP 78sc downloads, stores and displays crucial information, which means there’s no longer any need to manually enter data and there is no need for paper printouts either.
  7. Of course, this thing’s not perfect but then again, perfection has a different meaning for everyone and for something a little less expensive and complicated, you may want to take a look at the Garmin Echo 300C

Check out the full range of Garmin Fish finders here


1.    It doesn’t have a touch screen.
2.    It has no camera (although it has a picture viewer), and there are no outdoor GPS games.

Review Summary:

A GPS device is not limited to showing your location. Of course, the Garmin GPSMAP 78sc 2.6-Inch Waterproof Marine GPS and Chartplotter does that quite well. But it also takes note of other crucial information important to travellers over land and over water.

Not only will you never get lost again with this device, but you can also lead others to choice locations should there be a need to do so.

And at less than $450, it’s a worthy investment.

This video shows you a full product demonstration: