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
TUG_HITACHI
MMSI 431000342 · Call sign JG5744
Not yet on Master's MateType
Tug
Flag
JPNLength
36 m
Beam
10 m
Draft
4 m
Call sign
JG5744
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
21
TUG_HITACHI, a tugboat flying the Japanese flag, measures 36 metres on deck. She carries a beam of 10 m and a 4 m draft. She broadcasts as MMSI 431000342, call sign JG5744. Put TUG_HITACHI on the free Master's Mate Safety Initiative Network and keep the working fleet looking out for each other.
Free forever · No credit card · for working boats
Built for boats that work — like TUG_HITACHI.
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
36.4856° N, 140.6183° 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.
Free with your claim · for working boats
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put TUG_HITACHI 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 TUG_HITACHI and switch it all on
Free to join · nothing to install to start · cancel anytime
About TUG_HITACHI
What kind of vessel is TUG_HITACHI?
TUG_HITACHI is a Tug flagged to Japan.
Where was TUG_HITACHI last seen?
TUG_HITACHI was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is TUG_HITACHI's MMSI?
TUG_HITACHI's MMSI is 431000342. Call sign JG5744.
How big is TUG_HITACHI?
TUG_HITACHI is about 36 m long, 10 m on the beam, drawing 4 m.
Is TUG_HITACHI on the Master's Mate Safety Initiative Network?
Not yet. If TUG_HITACHI is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
© 2026 Master’s Mate. All rights reserved.