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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
SINKOU MARU
Cargo · Japan · last seen 36°N 140°E · Jun 2026 · MMSI 431000647 · Call sign JK5395
Not yet on Master's MateType
Cargo
Flag
JPNLength
50 m
Beam
13 m
Draft
3.6 m
Call sign
JK5395
IMO
9119919
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
13
A Japanese general cargo ship, SINKOU MARU measures 50 metres. She has a 13-metre beam and a draft measuring 3.6 metres. On the registers she's MMSI 431000647, call sign JK5395, IMO 9119919. Sign SINKOU MARU up free to the Master's Mate Safety Initiative Network and join a fleet that looks after its own.
Free forever · No credit card · for commercial operators
Eyes on SINKOU MARU, around the clock.
Real-time AIS, full systems telemetry, distress alerting and worldwide charts — your hull on one dashboard, from anywhere.
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Live AIS position · Jun 15, 2026 22:11 UTC
Position
35.5756° N, 139.7815° E
Speed
7.5 kn
Course
275°
Destination
>JP TYO XX
ETA
06-16 07:30 UTC
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Joining the Safety Initiative Network doesn't just put SINKOU 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 SINKOU MARU and switch it all on
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About SINKOU MARU
What kind of vessel is SINKOU MARU?
SINKOU MARU is a Cargo flagged to Japan.
Where was SINKOU MARU last seen?
SINKOU MARU was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is SINKOU MARU's MMSI?
SINKOU MARU's MMSI is 431000647. Call sign JK5395. IMO 9119919.
How big is SINKOU MARU?
SINKOU MARU is about 50 m long, 13 m on the beam, drawing 3.6 m.
Is SINKOU MARU on the Master's Mate Safety Initiative Network?
Not yet. If SINKOU MARU is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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