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
TADAMI MARU
MMSI 431010786 · Call sign JD4323
Not yet on Master's MateType
Tug
Flag
JPNLength
33 m
Beam
12 m
Draft
4.5 m
Call sign
JD4323
IMO
9826653
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
27
TADAMI MARU, a Japanese working tug, measures 33 metres on deck. She carries 12 metres in the beam and a 4.5-metre draft. Find her under MMSI 431010786, call sign JD4323, IMO 9826653. Add TADAMI MARU to the Master's Mate Safety Initiative Network — free to join, and the fleet keeps an eye out for each other.
Free forever · No credit card · for working boats
Built for boats that work — like TADAMI MARU.
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 3, 2026
Position
36.9252° N, 140.8761° 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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The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put TADAMI MARU 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 TADAMI MARU and switch it all on
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About TADAMI MARU
What kind of vessel is TADAMI MARU?
TADAMI MARU is a Tug flagged to Japan.
Where was TADAMI MARU last seen?
TADAMI MARU was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is TADAMI MARU's MMSI?
TADAMI MARU's MMSI is 431010786. Call sign JD4323. IMO 9826653.
How big is TADAMI MARU?
TADAMI MARU is about 33 m long, 12 m on the beam, drawing 4.5 m.
Is TADAMI MARU on the Master's Mate Safety Initiative Network?
Not yet. If TADAMI MARU is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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