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
KOHSEI MARU
Tanker · Liberia · last seen 35°N 129°E · Jun 2026 · MMSI 636026346 · Call sign A8SJ3
Not yet on Master's MateType
Tanker
Flag
LBRLength
99 m
Beam
15 m
Draft
4.5 m
Call sign
A8SJ3
IMO
9831543
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
24
KOHSEI MARU is a Liberian 99-metre tank ship. She's built with a 15-metre beam and a 4.5-metre draft. Find her under MMSI 636026346, call sign A8SJ3, IMO 9831543. Give KOHSEI MARU 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 KOHSEI 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 15, 2026 16:47 UTC
Position
35.0590° N, 129.0269° E
Status
At anchor
Speed
0.0 kn
Course
131°
Destination
KR PUS
ETA
06-12 01:00 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 KOHSEI 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 KOHSEI MARU and switch it all on
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About KOHSEI MARU
What kind of vessel is KOHSEI MARU?
KOHSEI MARU is a Tanker flagged to Liberia.
Where was KOHSEI MARU last seen?
KOHSEI MARU was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is KOHSEI MARU's MMSI?
KOHSEI MARU's MMSI is 636026346. Call sign A8SJ3. IMO 9831543.
How big is KOHSEI MARU?
KOHSEI MARU is about 99 m long, 15 m on the beam, drawing 4.5 m.
Is KOHSEI MARU on the Master's Mate Safety Initiative Network?
Not yet. If KOHSEI MARU is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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