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
SOURYOUMARU
MMSI 431000864 · Call sign JD2876
Not yet on Master's MateType
Tanker
Flag
JPNLength
65 m
Beam
10 m
Draft
3.5 m
Call sign
JD2876
IMO
9517977
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
26
SOURYOUMARU is a Japanese tank ship — 65 metres overall. Her hull carries a 10-metre beam and a draft of 3.5 m. On AIS she appears as MMSI 431000864, call sign JD2876, IMO 9517977. Give SOURYOUMARU the backing of the Master's Mate Safety Initiative Network — free, and a fleet that has her back.
Free forever · No credit card · for commercial operators
Eyes on SOURYOUMARU, 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 2, 2026
Position
35.8904° N, 140.6859° 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 SOURYOUMARU 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 SOURYOUMARU and switch it all on
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About SOURYOUMARU
What kind of vessel is SOURYOUMARU?
SOURYOUMARU is a Tanker flagged to Japan.
Where was SOURYOUMARU last seen?
SOURYOUMARU was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is SOURYOUMARU's MMSI?
SOURYOUMARU's MMSI is 431000864. Call sign JD2876. IMO 9517977.
How big is SOURYOUMARU?
SOURYOUMARU is about 65 m long, 10 m on the beam, drawing 3.5 m.
Is SOURYOUMARU on the Master's Mate Safety Initiative Network?
Not yet. If SOURYOUMARU is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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