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
Harima Maru
MMSI 431300387
Not yet on Master's MateFlag
JPNLength
152 m
IMO
9135119
AIS reports
2
Harima Maru, a boat wearing Japanese colours, measures 152 metres on deck. On AIS she shows as MMSI 431300387, IMO 9135119. Harima Maru is welcome on the Master's Mate Safety Initiative Network — a free, community-run watch where boats look out for one another.
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Is Harima 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.
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Live AIS position · Jun 9, 2026 15:01 UTC
Position
34.4219° N, 130.8642° E
Status
Under way (engine)
Speed
12.0 kn
Course
65°
Destination
>JP SZK /WM
ETA
06-10 03:30 UTC
Crossing the Sea of Japan? You're never out there alone.
Thousands of cruisers on the Master's Mate Network — ready to help the moment something goes wrong.
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The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put Harima 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 Harima Maru and switch it all on
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About Harima Maru
What kind of vessel is Harima Maru?
Harima Maru is a vessel flagged to Japan.
Where was Harima Maru last seen?
Harima Maru was last reported in the Sea of Japan on public AIS.
What is Harima Maru's MMSI?
Harima Maru's MMSI is 431300387. IMO 9135119.
How big is Harima Maru?
Harima Maru is about 152 m long.
Is Harima Maru on the Master's Mate Safety Initiative Network?
Not yet. If Harima Maru is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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