EMMA C

Particulars

MMSI	366834640
Call sign	WDP5200
Flag	United States
Vessel type	Tug
Length overall	21 m
Beam	9 m

From her own AIS broadcasts.

Her MMSI

366834640

The first three digits, 366, are the country code of the United States: 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	Under way under engine power
To the bow	6 m (A)
To the stern	15 m (B)
To the port side	5 m (C)
To the starboard side	4 m (D)
Destination as typed	US^0V7R>What the crew entered; the Voyage card turns it into a port.
Heard from	AISStream
On the map since	29 Oct 2026, 12:00 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

SSFFDRESCUEBOAT62 Search and rescue vessel0.2 nm
STARR Sailing vessel0.5 nm
MISSION BLUE Sailing vessel0.5 nm
SAN SAGGIO ANTHROPOI Sailing vessel0.6 nm
TAHINI Sailing vessel0.6 nm
EOS0.6 nm
CORESKY OL Cargo ship3.6 nm
CL NAKAMA Cargo ship3.7 nm

Where she is

Position	37.6643° N, 122.3783° W
Speed	Stopped, 0.0 knots
Local time

Voyage

From: San Francisco, United StatesStopped here now
To: US^0V7R>As broadcast
ETA: Not reported