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
KOUSHU MARU
Cargo · last seen 34°N 133°E · Jun 2026 · MMSI 431013684 · Call sign JD4635
Not yet on Master's MateType
Cargo
Length
61 m
Beam
9 m
Draft
4 m
Call sign
JD4635
IMO
9844174
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
5
KOUSHU MARU is a merchant ship, 61 metres on deck. She has a beam measuring 9 metres and a draft measuring 4 metres. She's listed under MMSI 431013684, call sign JD4635, IMO 9844174. The Master's Mate Safety Initiative Network welcomes KOUSHU MARU — free to join, cruiser-run, and always on watch.
Free forever · No credit card · for commercial operators
Eyes on KOUSHU 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
Live AIS position · Jun 16, 2026 11:51 UTC
Position
34.1806° N, 132.9437° E
Status
Moored
Speed
9.9 kn
Course
264°
Destination
JP HKT S/WS
ETA
12-31 15:00 UTC
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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The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put KOUSHU 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 KOUSHU MARU and switch it all on
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About KOUSHU MARU
What kind of vessel is KOUSHU MARU?
KOUSHU MARU is a Cargo.
Where was KOUSHU MARU last seen?
KOUSHU MARU was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is KOUSHU MARU's MMSI?
KOUSHU MARU's MMSI is 431013684. Call sign JD4635. IMO 9844174.
How big is KOUSHU MARU?
KOUSHU MARU is about 61 m long, 9 m on the beam, drawing 4 m.
Is KOUSHU MARU on the Master's Mate Safety Initiative Network?
Not yet. If KOUSHU MARU is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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