Arbitration picks the highest-priority available source. This is the default, and is reported whenever the operator has not pinned a source. X4 only.
A NMEA position supplied over SOIP by an external device. X4 only.
An operator-supplied position, set by clicking the map. Holds until released, and suppresses every sensor source while active. X4 only.
The vehicle's own onboard GPS, usable only at or near the surface. X4 only.
An acoustic USBL fix, without naming a vendor. Distinct from PositionSources.SEATRAC_USBL, which names a specific device on the older vehicles. X4 only.
Enumerates the possible vehicle location provider sources available to the Web App.