RYOHSINMARU

Particulars

MMSI	431014803
IMO number	9893785
Call sign	JD4748
Flag	Japan
Vessel type	Tanker
Length overall	68 m
Beam	10 m
Draught	3.6 m

From her own AIS broadcasts.

Her MMSI

431014803

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.

Her IMO number, 9893785, stays with the hull for life.

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	Under way under engine power
To the bow	53 m (A)
To the stern	15 m (B)
To the port side	1 m (C)
To the starboard side	9 m (D)
Destination as typed	JP KSM SE OFFWhat the crew entered; the Voyage card turns it into a port.
Heard from	AISStream
On the map since	31 Oct 2026, 08:08 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

MILD TUNE Cargo ship1.6 nm
SUNNY DAISY Cargo ship3.8 nm
SHURI Cargo ship4.6 nm
SALOME Cargo ship5.2 nm
KYOKUHOUMARU NO22 Tanker5.9 nm
KOUUN21 Cargo ship5.9 nm
SUMIYO Cargo ship6.5 nm
KOUEIMARU Tanker6.5 nm

Where she is

Position	33.6779° N, 136.2484° E
Speed	11.5 knots
Course	48°
Local time

Voyage

From: Chiba, JapanDeparted 17 Oct 2026 (inferred)
To: Kashima, Ibaraki, JapanAbout 258 nm away in a straight line
ETA: 1 Nov 23:00 UTC

ChibaKashima, Ibaraki