Your phone as deck instruments: live GPS speed and trip log, an anchor drag alarm that watches all night, waypoint range, bearing and ETA, and a man-overboard marker. Free, no sign-up, works with no phone signal.
GPS speed & trip log
Straight from your phone's GPS — no signal or SIM needed. Prop it at the helm.
–.–
SOG kn
– – –
COG °T
0.00
trip nm
0:00
underway
0.0
max kn
0.0
avg kn
position waiting for fix…
position
Fair warning & fair use: these instruments are a planning and monitoring aid using your device's GPS — accuracy varies with the phone and the sky. Not a substitute for the vessel's navigation systems, a proper lookout, or good seamanship. MOB button marks a position and steers you back to it; it does not replace MOB drills, DSC or AIS beacons. Free, offline-capable, from the chandlery that would rather you got home: more boat tools.