SEIKEN MARU

Particulars

MMSI	431009715
Call sign	JD4216
Flag	Japan
Vessel type	Cargo ship
Length overall	70 m
Beam	10 m

From her own AIS broadcasts.

Her MMSI

431009715

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	55 m (A)
To the stern	15 m (B)
To the port side	9 m (C)
To the starboard side	1 m (D)
Heard from	AISStream
On the map since	31 Oct 2026, 12:15 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

KOSHO MARU Tanker1.7 nm
SEIZAN MARU Cargo ship2.8 nm
FUKUHARU MARU Cargo ship2.9 nm
ZEN MARU NO.18 Cargo ship3.2 nm
MISIKAN Tanker3.4 nm
YACHIYOSHIRANUI MARU Tanker3.7 nm
EIYU MARU NO.11 Cargo ship4.0 nm
KUMANO MARU Tanker4.3 nm

Where she is

Position	33.7465° N, 136.2670° E
Speed	11.9 knots
Course	46°
Local time

Voyage

To: Not reported
ETA: Not reported