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.
Tug
YAMIZO
MMSI 431014764 · Call sign JD4730
Not yet on Master's MateType
Tug
Flag
JPNLength
35 m
Beam
12 m
Draft
3.5 m
Call sign
JD4730
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
26
Out of Japan, YAMIZO is a 35-metre harbour tug. She has 12 metres in the beam and a draft of 3.5 m. On AIS she shows as MMSI 431014764, call sign JD4730. It's free to add YAMIZO to the Master's Mate Safety Initiative Network — like AAA for the ocean, run by the cruisers who use it.
Free forever · No credit card · for working boats
Built for boats that work — like YAMIZO.
Engine & systems telemetry, live AIS, weather and distress alerting for the vessels that earn their keep.
Rig her out — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Last known position · Jun 2, 2026
Position
35.9331° N, 140.6945° E
Working the Sea of Japan? You're never out there alone.
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Joining the Safety Initiative Network doesn't just put YAMIZO on the map. It hands you the full bridge:
Systems Monitoring
Batteries, bilge, tanks, Victron & NMEA 2000 telemetry — your whole boat on one dashboard.
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.
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
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.
Onboard Cameras
Watch your boat from anywhere — live feeds and 24h recording, straight from your gateway.
Hail Any Captain
A verified captains directory + direct hailing. Reach the boat next to you, or across the bay.
Claim YAMIZO and switch it all on
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About YAMIZO
What kind of vessel is YAMIZO?
YAMIZO is a Tug flagged to Japan.
Where was YAMIZO last seen?
YAMIZO was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is YAMIZO's MMSI?
YAMIZO's MMSI is 431014764. Call sign JD4730.
How big is YAMIZO?
YAMIZO is about 35 m long, 12 m on the beam, drawing 3.5 m.
Is YAMIZO on the Master's Mate Safety Initiative Network?
Not yet. If YAMIZO is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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