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
KURAMAMARU
MMSI 431001536 · Call sign JD3078
Not yet on Master's MateType
Tug
Flag
JPNLength
35 m
Beam
11 m
Draft
3.7 m
Call sign
JD3078
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
23
KURAMAMARU is a working tug hailing from Japan, 35 metres overall. She carries a 11 m beam and a 3.7-metre draft. Her papers read MMSI 431001536, call sign JD3078. Join KURAMAMARU to the Master's Mate Safety Initiative Network — free, and built by cruisers for cruisers.
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Built for boats that work — like KURAMAMARU.
Engine & systems telemetry, live AIS, weather and distress alerting for the vessels that earn their keep.
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Last known position · Jun 3, 2026
Position
36.4289° N, 140.6117° 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 KURAMAMARU 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.
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About KURAMAMARU
What kind of vessel is KURAMAMARU?
KURAMAMARU is a Tug flagged to Japan.
Where was KURAMAMARU last seen?
KURAMAMARU was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is KURAMAMARU's MMSI?
KURAMAMARU's MMSI is 431001536. Call sign JD3078.
How big is KURAMAMARU?
KURAMAMARU is about 35 m long, 11 m on the beam, drawing 3.7 m.
Is KURAMAMARU on the Master's Mate Safety Initiative Network?
Not yet. If KURAMAMARU is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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