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
WAN HAI 172
MMSI 477225300 · Call sign VRFF4
Not yet on Master's MateFlag
HKGLength
172 m
Beam
27 m
Draft
9 m
Call sign
VRFF4
IMO
9380269
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
20
A Hong Kong craft, WAN HAI 172 measures 172 metres. She's built with a 27 m beam and a 9-metre draft. She's listed under MMSI 477225300, call sign VRFF4, IMO 9380269. The Master's Mate Safety Initiative Network welcomes WAN HAI 172 — free to join, cruiser-run, and always on watch.
Free forever · No credit card
Is WAN HAI 172 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
Last known position · Jun 3, 2026
Position
34.2153° N, 135.0027° E
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 WAN HAI 172 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 WAN HAI 172 and switch it all on
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About WAN HAI 172
What kind of vessel is WAN HAI 172?
WAN HAI 172 is a vessel flagged to Hong Kong S.A.R..
Where was WAN HAI 172 last seen?
WAN HAI 172 was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is WAN HAI 172's MMSI?
WAN HAI 172's MMSI is 477225300. Call sign VRFF4. IMO 9380269.
How big is WAN HAI 172?
WAN HAI 172 is about 172 m long, 27 m on the beam, drawing 9 m.
Is WAN HAI 172 on the Master's Mate Safety Initiative Network?
Not yet. If WAN HAI 172 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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