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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

TSUKASA

MMSI 431004957 · Call sign JD3561

Not yet on Master's Mate
Type
Tanker
Flag
JPNJPN
Length
104 m
Beam
16 m
Draft
5.3 m
Call sign
JD3561
IMO
9691242
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
62

A Japanese tank ship, TSUKASA measures 104 metres. She has a beam measuring 16 metres and a draft of 5.3 m. On AIS she shows as MMSI 431004957, call sign JD3561, IMO 9691242. TSUKASA is welcome on the Master's Mate Safety Initiative Network — a free, community-run watch where boats look out for one another.

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Live AIS position · Jun 9, 2026 06:44 UTC
Position
35.4914° N, 139.8024° E
Status
Under way (engine)
Speed
14.9 kn
Course
219°
Destination
>JP TYO HANEDA A
ETA
06-09 12:10 UTC
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Systems Monitoring
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About TSUKASA

What kind of vessel is TSUKASA?
TSUKASA is a Tanker flagged to Japan.
Where was TSUKASA last seen?
TSUKASA was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is TSUKASA's MMSI?
TSUKASA's MMSI is 431004957. Call sign JD3561. IMO 9691242.
How big is TSUKASA?
TSUKASA is about 104 m long, 16 m on the beam, drawing 5.3 m.
Is TSUKASA on the Master's Mate Safety Initiative Network?
Not yet. If TSUKASA is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).

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