MarineRadar — Home
HubNews & TrendsForumVesselLighthousePort
Sign inDownload
Google PlayApp Store
Download
✕
HubNews & TrendsForumVesselLighthousePort
Sign in
Japan flag

CHOKAI — Port Tender · MMSI 431023922

JPClass B
World map showing the last known position of CHOKAI at 35° 27.049' N, 139° 38.696' E
NSEW
Current PositionLast report

CHOKAI was last reported under way in the Sea of Japan, at 35.4508° N, 139.6449° E, on 6 Sep 2026, 23:00 UTC. It was sailing from YOKOHAMA to YOKOHAMA with an ETA of 6 Sep 2026, 22:37 UTC.

Show in Map
Updated 1 day ago using terrestrial data
Live Satellite · latest position

See where CHOKAI is now

Terrestrial data is 1 day old. Use a satellite credit for the latest position, updated minutes ago — satellites track vessels in the deep sea.

$0.99 for 1 satellite position

Get satellite position · $0.99Save up to 60% with credit packs →
Class B
Current Navigational Status
6.5 kn
Speed
248.0°
/ 511°
Course / Heading
---
Static Draught
---
Current Draught

Voyage Tracker

ATD
21:08 UTCSep 6, 2026
ETA
22:37 UTCSep 6, 2026
CHOKAI

CHOKAI

Identity

Port Tender
Type
Japan flagJP
Flag
N/A
IMO Number
431023922
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
Live tracking · 50,000+ mariners

Track CHOKAI live on MarineRadar

Real-time AIS positions, voyage history, and arrival alerts for CHOKAI — straight from your phone.

Live AIS positionsVoyage historyArrival alerts
Get the App

4.6 ★ · 18,000 reviews

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

Flag State
All JP-flagged vessels
Browse every ship currently registered under the JP flag, with live AIS positions.
Departure Port
Port of YOKOHAMA
Port traffic, arrivals and live vessel positions for YOKOHAMA (JPYOK).

About CHOKAI

Identity · Ownership · Class · Route

CHOKAI — Port Tender

CHOKAI is a port tender registered under the Japan flag.

CHOKAI route and voyage history

CHOKAI is currently on a voyage from YOKOHAMA to YOKOHAMA with an estimated arrival on 2026-09-06T22:37:00Z. The live route and current course of CHOKAI 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 CHOKAI can be seen in the Similar Vessels section above.

  • MMSI: 431023922
  • Flag state: Japan

Frequently Asked Questions

Where is CHOKAI right now?+
CHOKAI was last reported under way in the Sea of Japan, within the Japan / Korea shipping lane, on 6 Sep 2026, 23:00 UTC. It was sailing from YOKOHAMA to YOKOHAMA with an ETA of 6 Sep 2026, 22:37 UTC. 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 CHOKAI?+
CHOKAI broadcasts MMSI 431023922. 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 CHOKAI?+
CHOKAI is classified as a port tender vessel registered under the JP flag. The vessel-type classification is derived from the AIS Type field broadcast by the ship's transponder and full JP flag list at /flag/jp.
How can I see the live position of CHOKAI?+
MarineRadar shows the latest AIS broadcast from CHOKAI 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 CHOKAI'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 CHOKAI?+
As a port tender, CHOKAI sits in the same design class as the other port tenders listed in the Similar Vessels section of the vessel page.

CHOKAI — Key Facts

MMSI
431023922
Vessel type
Port Tender
Flag state
JP
Navigation status
Class B
Current speed
6.5 knots
Course over ground
248.0°
Heading
511°
Last known position
35.4508°, 139.6449°
Destination
YOKOHAMA
ETA
2026-09-06T22:37:00Z
Departure port
YOKOHAMA
Actual time of departure
2026-09-06T21:08:00Z
AIS last updated
2026-09-06T23:00:26Z