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
Dong Hai
MMSI 477097100
Not yet on Master's MateFlag
HKGLength
117 m
IMO
9376426
AIS reports
2
Dong Hai is a Hong Kong craft, measuring 117 metres. Her registration reads MMSI 477097100, IMO 9376426. Dong Hai belongs on the Master's Mate Safety Initiative Network, a free safety net shared by boats the world over.
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Is Dong Hai 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
Live AIS position · Jun 9, 2026 12:15 UTC
Position
35.6173° N, 139.7636° E
Status
Under way (engine)
Speed
3.2 kn
Course
330°
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 Dong Hai 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 Dong Hai and switch it all on
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About Dong Hai
What kind of vessel is Dong Hai?
Dong Hai is a vessel flagged to Hong Kong S.A.R..
Where was Dong Hai last seen?
Dong Hai was last reported in the Sea of Japan on public AIS.
What is Dong Hai's MMSI?
Dong Hai's MMSI is 477097100. IMO 9376426.
How big is Dong Hai?
Dong Hai is about 117 m long.
Is Dong Hai on the Master's Mate Safety Initiative Network?
Not yet. If Dong Hai is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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