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South Korea flag

SF20S4 — Unknown · IMO 0

KR
World map showing the last known position of SF20S4 at 35° 5.002' N, 128° 59.958' E
NSEW
Current PositionLast report

SF20S4 was last reported in the Sea of Japan, at 35.0834° N, 128.9993° E.

Show in Map
Updated — using terrestrial data
Live Satellite · latest position

See where SF20S4 is now

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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
SF20S4

SF20S4

Identity

Unknown
Type
South Korea flagKR
Flag
0
IMO Number
440406750
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 SF20S4 — straight from your phone.

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Dive into the fleet, port, and flag state that SF20S4 is part of.

Flag State
All KR-flagged vessels
Browse every ship currently registered under the KR flag, with live AIS positions.

About SF20S4

Identity · Ownership · Class · Route

SF20S4 — Vessel

SF20S4 is a maritime vessel registered under the South Korea flag.

SF20S4 route and voyage history

The most recent AIS broadcast from SF20S4 is shown on the live map above. The live route and current course of SF20S4 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 SF20S4 can be seen in the Similar Vessels section above.

Frequently Asked Questions

Where is SF20S4 right now?+
SF20S4 was last reported in the Sea of Japan, within the Japan / Korea shipping lane. 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 SF20S4?+
SF20S4 broadcasts MMSI 440406750 and is registered as IMO 0. 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 SF20S4?+
SF20S4 is classified as a unknown vessel registered under the KR flag. The vessel-type classification is derived from the AIS Type field broadcast by the ship's transponder and full KR flag list at /flag/kr.
How can I see the live position of SF20S4?+
MarineRadar shows the latest AIS broadcast from SF20S4 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 SF20S4'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 SF20S4?+
As a unknown, SF20S4 sits in the same design class as the other unknowns listed in the Similar Vessels section of the vessel page.

SF20S4 — Key Facts

MMSI
440406750
IMO number
0
Vessel type
Unknown
Flag state
KR
Current speed
0.0 knots
Course over ground
0.0°
Last known position
35.0834°, 128.9993°