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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.
Tanker

KAIYO MARU

Tanker · Japan · last seen 35°N 135°E · Jun 2026 · MMSI 431005329 · Call sign JD3685

Not yet on Master's Mate
Type
Tanker
Flag
JPNJPN
Length
52 m
Beam
9 m
Draft
3 m
Call sign
JD3685
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
31

KAIYO MARU, a tank ship wearing Japanese colours, measures 52 metres on deck. KAIYO MARU has a beam measuring 9 metres and a 3-metre draft. Find her under MMSI 431005329, call sign JD3685. Bring KAIYO MARU aboard the Master's Mate Safety Initiative Network — free, and every captain on it has the others' backs.

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Live AIS position · Jun 15, 2026 13:45 UTC
Position
34.6845° N, 135.2021° E
Status
Under way (engine)
Speed
0.0 kn
Course
228°
Destination
JP UKB
ETA
06-15 14:30 UTC
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Systems Monitoring
Batteries, bilge, tanks, Victron & NMEA 2000 telemetry — your whole boat on one dashboard.
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About KAIYO MARU

What kind of vessel is KAIYO MARU?
KAIYO MARU is a Tanker flagged to Japan.
Where was KAIYO MARU last seen?
KAIYO MARU was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is KAIYO MARU's MMSI?
KAIYO MARU's MMSI is 431005329. Call sign JD3685.
How big is KAIYO MARU?
KAIYO MARU is about 52 m long, 9 m on the beam, drawing 3 m.
Is KAIYO MARU on the Master's Mate Safety Initiative Network?
Not yet. If KAIYO MARU is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).

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