KOUFUKU MARU

Particulars

MMSI	431300333
Call sign	JJ3919
Flag	Japan
Vessel type	Towing
Length overall	30 m
Beam	8 m

From her own AIS broadcasts.

Her MMSI

431300333

The first three digits, 431, are the country code of Japan: an MMSI follows a ship's flag, so a new flag brings a new number.

She broadcasts no IMO number. Only larger seagoing ships are required to have one.

Her AIS details

AIS is the radio signal a ship sends so that other ships can see her. This is what her signal tells us.

Seen from above, bow to the right, so port is the upper side. The ring is her GPS aerial, where her crew or installer said it sits. Shiptrail draws the aerial's position, not the middle of the ship.

AIS class	Class BWorked out, not reported: only Class A transponders send a status, and she sends none. Class B is the lighter kind on yachts, fishing boats and other small craft, which reports less often.
To the bow	12 m (A)
To the stern	18 m (B)
To the port side	6 m (C)
To the starboard side	2 m (D)
Heard from	AISStream
On the map since	31 Oct 2026, 20:55 UTC

A, B, C and D are AIS's own names for these four distances.

From her own AIS broadcasts as the feed delivers them.

Ships near her

JINSHOMARU NO.21 Fishing vessel2.1 nm
SANNOU Cargo ship2.5 nm
SHINSHINMARU Tanker4.5 nm
GRAND SAILING Cargo ship5.4 nm
TOSHIN MARU Cargo ship5.9 nm
WAKAYOSHIMARU NO.8 Cargo ship5.9 nm
OOZU MARU NO.10 Tanker6.5 nm
SATUMIMARU Cargo ship7.0 nm

Where she is

Position	33.8060° N, 136.2239° E
Speed	5.2 knots
Course	226°
Local time

Voyage

To: Not reported
ETA: Not reported