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
Hiyoshi Maru No. 17
MMSI 431000991
Not yet on Master's MateFlag
JPNLength
67 m
IMO
9523732
AIS reports
2
Hiyoshi Maru No. 17, a craft listed on the Japan registry, measures 67 metres on deck. She broadcasts as MMSI 431000991, IMO 9523732. Hiyoshi Maru No. 17 is welcome on the Master's Mate Safety Initiative Network — a free, community-run watch where boats look out for one another.
Free forever · No credit card
Is Hiyoshi Maru No. 17 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 Hiyoshi Maru No. 17 roams, 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 Hiyoshi Maru No. 17 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 Hiyoshi Maru No. 17 and switch it all on
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About Hiyoshi Maru No. 17
What kind of vessel is Hiyoshi Maru No. 17?
Hiyoshi Maru No. 17 is a vessel flagged to Japan.
What is Hiyoshi Maru No. 17's MMSI?
Hiyoshi Maru No. 17's MMSI is 431000991. IMO 9523732.
How big is Hiyoshi Maru No. 17?
Hiyoshi Maru No. 17 is about 67 m long.
Is Hiyoshi Maru No. 17 on the Master's Mate Safety Initiative Network?
Not yet. If Hiyoshi Maru No. 17 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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