MMSI 366446840 · Call sign WBU6818
Not yet on Master's MateONWARD, a leisure boat under American registration, measures 13.9 metres on deck. She carries 4 metres in the beam and a 2.9 m draft. On the registers she's MMSI 366446840, call sign WBU6818. Claim ONWARD free and let the Master's Mate Safety Initiative Network keep an eye on her, on the water or off.
Anchor alarms that wake you, a live camera at the dock, and weather you can trust before every run.
Look after her — claim free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Joining the Safety Initiative Network doesn't just put ONWARD on the map. It hands you the full bridge:
© 2026 Master’s Mate. All rights reserved.