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
YAMATO
MMSI 431101141 · Call sign JD2252
Not yet on Master's MateType
Tug
Flag
JPNLength
43 m
Beam
13 m
Draft
3.6 m
Call sign
JD2252
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
3
YAMATO is a Japanese working tug — 43 metres overall. She's built with a 13 m beam and a 3.6-metre draft. Look for MMSI 431101141, call sign JD2252. Working vessels like YAMATO are never truly alone on the Master's Mate Safety Initiative Network — free, with a fleet on watch.
Free forever · No credit card · for working boats
Built for boats that work — like YAMATO.
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
34.9949° N, 138.4993° E
Working the Sea of Japan? 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 YAMATO 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 YAMATO and switch it all on
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About YAMATO
What kind of vessel is YAMATO?
YAMATO is a Tug flagged to Japan.
Where was YAMATO last seen?
YAMATO was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is YAMATO's MMSI?
YAMATO's MMSI is 431101141. Call sign JD2252.
How big is YAMATO?
YAMATO is about 43 m long, 13 m on the beam, drawing 3.6 m.
Is YAMATO on the Master's Mate Safety Initiative Network?
Not yet. If YAMATO is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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