GPSMAP 78S

For boaters and watersports enthusiasts who want to run with the best, the rugged GPSMAP 78s features a 3-axis compass, barometric altimeter, crisp colour mapping, high-sensitivity receiver, new moulded rubber side grips, plus a microSD card slot for loading additional maps. Device floats if dropped in water.

Waterproof: yes
Floats: yes
High-sensitivity receiver: yes
Interface: high-speed USB and NMEA 0183 compatible
Basemap: yes
Ability to add maps: yes
Built-in memory: 1.7 GB
Accepts data cards: microSD card (not included)
Waypoints/favorites/locations: 2000
Routes: 200
Track log: 10,000 points, 200 saved tracks