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

Hokuyo Maru

MMSI 431501083

Not yet on Master's Mate

Flag

JPN

Length

119 m

IMO

9185475

AIS reports

Hokuyo Maru is a craft hailing from Japan, spanning 119 metres. Her registration reads MMSI 431501083, IMO 9185475. Claim Hokuyo Maru free on the Master's Mate Safety Initiative Network and let nearby cruisers have her back.

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Is Hokuyo Maru 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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Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers

Wherever Hokuyo 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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The most powerful cruising platform ever built — yours, free.

Joining the Safety Initiative Network doesn't just put Hokuyo 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.

Claim Hokuyo Maru and switch it all on

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About Hokuyo Maru

What kind of vessel is Hokuyo Maru?

Hokuyo Maru is a vessel flagged to Japan.

What is Hokuyo Maru's MMSI?

Hokuyo Maru's MMSI is 431501083. IMO 9185475.

How big is Hokuyo Maru?

Hokuyo Maru is about 119 m long.

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

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