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
Yuhomaru No. 15
MMSI 431730000
Not yet on Master's MateFlag
JPNLength
80.4 m
IMO
9844150
AIS reports
2
Yuhomaru No. 15 is a Japanese craft — 80.4 metres overall. On AIS she appears as MMSI 431730000, IMO 9844150. Claim Yuhomaru No. 15 free on the Master's Mate Safety Initiative Network and let nearby cruisers have her back.
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Is Yuhomaru No. 15 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 10, 2026 06:10 UTC
Position
34.3310° N, 135.0345° E
Status
Under way (engine)
Speed
14.0 kn
Course
45°
Crossing the Sea of Japan? You're never out there alone.
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Joining the Safety Initiative Network doesn't just put Yuhomaru No. 15 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 Yuhomaru No. 15 and switch it all on
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About Yuhomaru No. 15
What kind of vessel is Yuhomaru No. 15?
Yuhomaru No. 15 is a vessel flagged to Japan.
Where was Yuhomaru No. 15 last seen?
Yuhomaru No. 15 was last reported in the Sea of Japan on public AIS.
What is Yuhomaru No. 15's MMSI?
Yuhomaru No. 15's MMSI is 431730000. IMO 9844150.
How big is Yuhomaru No. 15?
Yuhomaru No. 15 is about 80.4 m long.
Is Yuhomaru No. 15 on the Master's Mate Safety Initiative Network?
Not yet. If Yuhomaru No. 15 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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