Question 1

Where is ASO MARU NO.8 right now?

Accepted Answer

ASO MARU NO.8 has not broadcast an AIS position for 181 days. The most recent broadcast placed it in the Sea of Japan, on 11 Mar 2026, 07:24 UTC. It was sailing from SHIMONOSEKI to KAGOSHIMA. Vessels stop appearing on terrestrial AIS when they move beyond receiver range, so a gap does not necessarily mean the vessel is inactive.

Question 2

What are the identifiers for ASO MARU NO.8?

Accepted Answer

ASO MARU NO.8 broadcasts MMSI 431601180 and is registered as IMO 8712752, with call sign JM5729. 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.

Question 3

What type of ship is ASO MARU NO.8?

Accepted Answer

ASO MARU NO.8 is classified as a tug vessel registered under the JP 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 JP flag list at /flag/jp.

Question 4

How can I see the live position of ASO MARU NO.8?

Accepted Answer

MarineRadar shows the latest AIS broadcast from ASO MARU NO.8 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.

Question 5

How often is ASO MARU NO.8's position updated?

Accepted Answer

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.

Question 6

What class is ASO MARU NO.8?

Accepted Answer

ASO MARU NO.8 is classed by NIPPON KAIJI KYOKAI (NKK), the classification society responsible for inspecting the vessel against safety, structural and operational rules. As a tug, ASO MARU NO.8 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. ASO MARU NO.8 has a gross tonnage of 397 GT.

ASO MARU NO.8 — Tug · IMO 8712752

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About ASO MARU NO.8

ASO MARU NO.8 — Tug

ASO MARU NO.8 route and voyage history

Vessel class and identifiers

Frequently Asked Questions

ASO MARU NO.8 — Key Facts