KAIREIMARU

Particulars

MMSI	431027281
Call sign	JD5507
Flag	Japan
Vessel type	Tug
Length overall	38 m
Beam	12 m

From her own AIS broadcasts.

Her MMSI

431027281

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 AWorked out, not reported: only Class A transponders send a status, and she sends one. Class A is the full-strength kind that large cargo and passenger ships must carry.
Status she reports	Not defined
To the bow	12 m (A)
To the stern	26 m (B)
To the port side	8 m (C)
To the starboard side	4 m (D)
Destination as typed	JP AFGWhat the crew entered; the Voyage card turns it into a port.
Heard from	AISStream
On the map since	20 Oct 2026, 23:44 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

NO.7,,DAIFUKU0.1 nm
FEDERAL IRIS Cargo ship0.7 nm
FAIRMASTER Cargo ship0.9 nm
NO.3WAKAMIGO1.0 nm
SYOHOUMARU Cargo ship1.0 nm
TOUNAN MARU Tanker1.0 nm
ALFONSINO ARROW Tug1.6 nm
SHINGENKAI Tanker1.7 nm

Where she is

Position	39.7730° N, 140.0495° E
Speed	Stopped, 0.0 knots
Local time

Voyage

From: Akita, JapanStopped here now
To: Akitafunagawa, JapanAbout 8.1 nm away in a straight line
ETA: Not reported

AkitaAkitafunagawa