The ViewLine GPS speedometers are primarily designed for horizontal mounting. Vertical mounting is also possible, but performance may decrease. The gauge can be installed in both open vessels and cabins. In cabin installations, the signal is stronger if the meter has the free air contact. Objects or other restrictions of free air contact may interfere with the signal. It is recommended to test the signal strength first via the GPS signal indication, And only then drill holes in the dashboard. The instrument measures speed over the ground, course over the ground, time and distance traveled. An NMEA 2000 output is built-in. All ViewLine meters have interchangeable edges in different colors and profiles. Create your own gauge with the clip-on bezels in different colors and profiles.