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
Kayoh Maru
MMSI 431400908
Not yet on Master's MateFlag
JPNLength
71 m
IMO
8704248
AIS reports
2
A Japanese vessel, Kayoh Maru measures 71 metres. She's on record as MMSI 431400908, IMO 8704248. Sign Kayoh Maru up free to the Master's Mate Safety Initiative Network and join a fleet that looks after its own.
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Is Kayoh 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 Kayoh 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 Kayoh 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 Kayoh Maru and switch it all on
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About Kayoh Maru
What kind of vessel is Kayoh Maru?
Kayoh Maru is a vessel flagged to Japan.
What is Kayoh Maru's MMSI?
Kayoh Maru's MMSI is 431400908. IMO 8704248.
How big is Kayoh Maru?
Kayoh Maru is about 71 m long.
Is Kayoh Maru on the Master's Mate Safety Initiative Network?
Not yet. If Kayoh Maru is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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