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
Koki Maru No. 51
MMSI 431501736
Not yet on Master's MateFlag
JPNLength
69 m
IMO
8974908
AIS reports
2
Out of Japan, Koki Maru No. 51 is a 69-metre boat. Find her under MMSI 431501736, IMO 8974908. Koki Maru No. 51 belongs on the Master's Mate Safety Initiative Network, a free safety net shared by boats the world over.
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Is Koki Maru No. 51 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 Koki Maru No. 51 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 Koki Maru No. 51 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 Koki Maru No. 51 and switch it all on
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About Koki Maru No. 51
What kind of vessel is Koki Maru No. 51?
Koki Maru No. 51 is a vessel flagged to Japan.
What is Koki Maru No. 51's MMSI?
Koki Maru No. 51's MMSI is 431501736. IMO 8974908.
How big is Koki Maru No. 51?
Koki Maru No. 51 is about 69 m long.
Is Koki Maru No. 51 on the Master's Mate Safety Initiative Network?
Not yet. If Koki Maru No. 51 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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