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

Ferry Yonakuni

MMSI 431680049

Not yet on Master's Mate

Flag

JPN

Length

68 m

IMO

8820808

AIS reports

Ferry Yonakuni is a Japanese 68-metre boat. On AIS she appears as MMSI 431680049, IMO 8820808. Join Ferry Yonakuni to the Master's Mate Safety Initiative Network — free, and built by cruisers for cruisers.

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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 Ferry Yonakuni 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 Ferry Yonakuni 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 Ferry Yonakuni and switch it all on

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About Ferry Yonakuni

What kind of vessel is Ferry Yonakuni?

Ferry Yonakuni is a vessel flagged to Japan.

What is Ferry Yonakuni's MMSI?

Ferry Yonakuni's MMSI is 431680049. IMO 8820808.

How big is Ferry Yonakuni?

Ferry Yonakuni is about 68 m long.

Is Ferry Yonakuni on the Master's Mate Safety Initiative Network?

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