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Taiwan flag

APT NO.503 — Tug · IMO 9444132

TW
World map showing the last known position of APT NO.503 at 22° 35.112' N, 120° 18.145' E
NSEW
Current PositionLast report

APT NO.503 was last reported in the South China Sea, at 22.5852° N, 120.3024° E.

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Updated — using terrestrial data
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Unknown
Current Navigational Status
0.0 kn
Speed
0.0°
/ ---
Course / Heading
---
Static Draught
---
Current Draught

Voyage Tracker

N/A
ATD
N/A
N/A
ETA
N/A
APT NO.503

APT NO.503

Identity

Tug
Type
Taiwan flagTW
Flag
9444132
IMO Number
416007985
MMSI
N/A
Call Sign

Specifications

N/A
Length × Breadth
N/A
Year Built
N/A
Deadweight
N/A
Gross Tonnage
N/A
Engine Power
N/A
Builder
N/A
Class Society
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Real-time AIS positions, voyage history, and arrival alerts for APT NO.503 — straight from your phone.

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Dive into the fleet, port, and flag state that APT NO.503 is part of.

Flag State
All TW-flagged vessels
Browse every ship currently registered under the TW flag, with live AIS positions.
Vessel Type
Browse all Tugs
See the global fleet of tugs tracked on MarineRadar with live AIS data.

About APT NO.503

Identity · Ownership · Class · Route

APT NO.503 — Tug

APT NO.503 is a tug registered under the Taiwan, Province of China flag.

APT NO.503 route and voyage history

The most recent AIS broadcast from APT NO.503 is shown on the live map above. The live route and current course of APT NO.503 are shown on the bridge map above, updated whenever the vessel is in range of a coastal AIS receiver or a satellite pass.

Vessel class and identifiers

Vessels in the same class as APT NO.503 can be seen in the Similar Vessels section above or in the full tug fleet at /vessel-type/tug-pilot-vessel.

Frequently Asked Questions

Where is APT NO.503 right now?+
APT NO.503 was last reported in the South China Sea, within the Taiwan Strait. Its exact coordinates, speed and ETA are shown at the top of this page and refresh from the latest AIS broadcast.
What are the identifiers for APT NO.503?+
APT NO.503 broadcasts MMSI 416007985 and is registered as IMO 9444132. The MMSI is the radio identifier used by AIS; the IMO number stays with the ship for life and does not change with re-flagging or sale.
What type of ship is APT NO.503?+
APT NO.503 is classified as a tug vessel registered under the TW flag. The vessel-type classification is derived from the AIS Type field broadcast by the ship's transponder; full tug fleet at /vessel-type/tug-pilot-vessel and full TW flag list at /flag/tw.
How can I see the live position of APT NO.503?+
MarineRadar shows the latest AIS broadcast from APT NO.503 above, with current position, course, speed, and navigation status. Tap "View on map" to centre the live tracker on the vessel and watch its movement update in real time. The same data is available offline-friendly in the iOS and Android apps.
How often is APT NO.503's position updated?+
AIS transponders broadcast position every 2 seconds when underway at high speed and up to every 3 minutes at anchor. The position you see refreshes whenever the ship is in range of a coastal AIS receiver or a satellite pass — typically seconds in coastal waters and minutes offshore.
What class is APT NO.503?+
As a tug, APT NO.503 sits in the same design class as the other tugs listed in the Similar Vessels section of the vessel page, or in the full tug directory at /vessel-type/tug-pilot-vessel.

APT NO.503 — Key Facts

MMSI
416007985
IMO number
9444132
Vessel type
Tug
Flag state
TW
Current speed
0.0 knots
Course over ground
0.0°
Last known position
22.5852°, 120.3024°