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.
Tanker
SHINPU MARU
MMSI 431004247 · Call sign JD3456
Not yet on Master's MateType
Tanker
Flag
JPNLength
71 m
Beam
12 m
Draft
5 m
Call sign
JD3456
IMO
9677064
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
55
Registered in Japan, SHINPU MARU is a 71-metre tanker. SHINPU MARU has a beam measuring 12 metres and a 5 m draft. Find her under MMSI 431004247, call sign JD3456, IMO 9677064. Bring SHINPU MARU aboard the Master's Mate Safety Initiative Network — free, and every captain on it has the others' backs.
Free forever · No credit card · for commercial operators
Eyes on SHINPU MARU, around the clock.
Real-time AIS, full systems telemetry, distress alerting and worldwide charts — your hull on one dashboard, from anywhere.
Put her on the dashboard — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Last known position · Jun 4, 2026
Position
38.4146° N, 141.2648° E
Transiting 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 SHINPU MARU on the map. It hands you the full bridge:
Live AIS & Traffic
See every vessel around you in real time. Closest-approach warnings before they matter.
Systems Monitoring
Batteries, bilge, tanks, Victron & NMEA 2000 telemetry — your whole boat on one dashboard.
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
Worldwide Charts
Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
Anchor Watch
GPS-precise drag alarms that actually wake you — and your whole crew. Sleep through the night.
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 SHINPU MARU and switch it all on
Free to join · nothing to install to start · cancel anytime
About SHINPU MARU
What kind of vessel is SHINPU MARU?
SHINPU MARU is a Tanker flagged to Japan.
Where was SHINPU MARU last seen?
SHINPU MARU was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is SHINPU MARU's MMSI?
SHINPU MARU's MMSI is 431004247. Call sign JD3456. IMO 9677064.
How big is SHINPU MARU?
SHINPU MARU is about 71 m long, 12 m on the beam, drawing 5 m.
Is SHINPU MARU on the Master's Mate Safety Initiative Network?
Not yet. If SHINPU MARU is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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