Master's MateSafety Initiative Network
The Master's Mate Safety Initiative Network (MMSIn) — like AAA for the ocean, but free & community-driven. Cruisers keeping each other safe: anchor-drag & distress alerts, a verified captains directory, and a watch network that has your back.
Vessel
Hokkai Maru
MMSI 431800139
Not yet on Master's MateFlag
JPNLength
31 m
IMO
8864646
AIS reports
2
Hokkai Maru is a boat flagged in Japan, 31 metres from stem to stern. On AIS she shows as MMSI 431800139, IMO 8864646. Hokkai Maru is welcome on the Master's Mate Safety Initiative Network — a free, community-run watch where boats look out for one another.
Free forever · No credit card
Is Hokkai Maru your boat?
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
Wherever Hokkai Maru roams, you're never out there alone.
Thousands of cruisers on the Master's Mate Network — ready to help the moment something goes wrong.
Free with your claim
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put Hokkai Maru on the map. It hands you the full bridge:
Anchor Watch
GPS-precise drag alarms that actually wake you — and your whole crew. Sleep through the night.
Worldwide Charts
Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.
Live AIS & Traffic
See every vessel around you in real time. Closest-approach warnings before they matter.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
Onboard Cameras
Watch your boat from anywhere — live feeds and 24h recording, straight from your gateway.
Systems Monitoring
Batteries, bilge, tanks, Victron & NMEA 2000 telemetry — your whole boat on one dashboard.
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
Hail Any Captain
A verified captains directory + direct hailing. Reach the boat next to you, or across the bay.
Claim Hokkai Maru and switch it all on
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About Hokkai Maru
What kind of vessel is Hokkai Maru?
Hokkai Maru is a vessel flagged to Japan.
What is Hokkai Maru's MMSI?
Hokkai Maru's MMSI is 431800139. IMO 8864646.
How big is Hokkai Maru?
Hokkai Maru is about 31 m long.
Is Hokkai Maru on the Master's Mate Safety Initiative Network?
Not yet. If Hokkai Maru is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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