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

Tenpaizan Maru

MMSI 431602283

Not yet on Master's Mate

Flag

JPN

Length

126 m

IMO

9316696

AIS reports

A Japanese boat, Tenpaizan Maru measures 126 metres. On AIS she appears as MMSI 431602283, IMO 9316696. Tenpaizan Maru is invited to the free Master's Mate Safety Initiative Network, where cruisers keep each other safe.

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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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Wherever Tenpaizan Maru 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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Joining the Safety Initiative Network doesn't just put Tenpaizan 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.

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About Tenpaizan Maru

What kind of vessel is Tenpaizan Maru?

Tenpaizan Maru is a vessel flagged to Japan.

What is Tenpaizan Maru's MMSI?

Tenpaizan Maru's MMSI is 431602283. IMO 9316696.

How big is Tenpaizan Maru?

Tenpaizan Maru is about 126 m long.

Is Tenpaizan Maru on the Master's Mate Safety Initiative Network?

Not yet. If Tenpaizan Maru is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).