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.
Cargo
SHOSEIMARU
MMSI 431014827 · Call sign JD4777
Not yet on Master's MateType
Cargo
Flag
JPNLength
75 m
Beam
12 m
Draft
4.7 m
Call sign
JD4777
IMO
9900928
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
21
Registered in Japan, SHOSEIMARU is a 75-metre cargo ship. SHOSEIMARU has a beam measuring 12 metres and a 4.7 m draft. She's on record as MMSI 431014827, call sign JD4777, IMO 9900928. Put SHOSEIMARU on the Master's Mate Safety Initiative Network — free to claim, with a whole fleet watching out for her.
Free forever · No credit card · for commercial operators
Eyes on SHOSEIMARU, 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
34.0489° N, 135.0348° 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.
Free with your claim · for commercial operators
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put SHOSEIMARU 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 SHOSEIMARU and switch it all on
Free to join · nothing to install to start · cancel anytime
About SHOSEIMARU
What kind of vessel is SHOSEIMARU?
SHOSEIMARU is a Cargo flagged to Japan.
Where was SHOSEIMARU last seen?
SHOSEIMARU was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is SHOSEIMARU's MMSI?
SHOSEIMARU's MMSI is 431014827. Call sign JD4777. IMO 9900928.
How big is SHOSEIMARU?
SHOSEIMARU is about 75 m long, 12 m on the beam, drawing 4.7 m.
Is SHOSEIMARU on the Master's Mate Safety Initiative Network?
Not yet. If SHOSEIMARU is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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