last seen 51°N 1°W · Jun 2026 · MMSI 235015000
Not yet on Master's MateCHALLENGER 5 is a boat. On the registers she's MMSI 235015000. CHALLENGER 5 is invited to the free Master's Mate Safety Initiative Network, where cruisers keep each other safe.
Your free claim unlocks the most powerful cruising platform ever built — anchor watch, worldwide charts, live AIS, weather routing, and a network of cruisers watching each other’s backs.
Claim this boat — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Joining the Safety Initiative Network doesn't just put CHALLENGER 5 on the map. It hands you the full bridge:
© 2026 Master’s Mate. All rights reserved.