Waterproof housing that can be used either in upright portrait mode or in landscape mode. These units are still plentiful in the used market. Accessories (interface cable, mounts, etc) are still readily available. The aerial is detachable, it can be removed and remote-mounted, or another remote GPS antenna can be connected.

GPS V
Display resolution improved to 256 x 160, tracklog expanded to 3000 points, WAAS/EGNOS [6] capability. The V can load 19MB of map tiles, but this can take about 45 minutes via serial port.