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
IWAKI MARU
MMSI 431023219 · Call sign JD5340
Not yet on Master's MateType
Tug
Flag
JPNLength
32 m
Beam
11 m
Draft
4.5 m
Call sign
JD5340
IMO
1024340
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
28
IWAKI MARU is a Japanese 32-metre tugboat. IWAKI MARU has a beam of 11 m and a 4.5 m draft. On the registers she's MMSI 431023219, call sign JD5340, IMO 1024340. There's a place for IWAKI MARU on the Master's Mate Safety Initiative Network — free, community-driven, like AAA for the ocean.
Free forever · No credit card · for working boats
Built for boats that work — like IWAKI 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
36.9223° N, 140.8815° 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 IWAKI 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 IWAKI MARU and switch it all on
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About IWAKI MARU
What kind of vessel is IWAKI MARU?
IWAKI MARU is a Tug flagged to Japan.
Where was IWAKI MARU last seen?
IWAKI MARU was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is IWAKI MARU's MMSI?
IWAKI MARU's MMSI is 431023219. Call sign JD5340. IMO 1024340.
How big is IWAKI MARU?
IWAKI MARU is about 32 m long, 11 m on the beam, drawing 4.5 m.
Is IWAKI MARU on the Master's Mate Safety Initiative Network?
Not yet. If IWAKI MARU is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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