Identification of vessels, owners and ISM managers

  • Published: 23/11/2016

Vessels are identified with call signs and IMO numbers. ISM managers and registered owners of vessels of 100 GT and above engaged on international voyages are also assigned IMO identifications numbers.

If the vessel has not been assigned an IMO number or a Norwegian call sign prior to registration, these numbers will be allocated by/ via the Department of Ship Registration.

1. Which vessels are assigned IMO numbers?

Propelled, sea-going merchant ships of 100 GT and above upon keel laying with the exception of the following:

  • Ships without mechanical means of propulsion
  • Pleasure yachts
  • Ships engaged on special service (e.g. lightships, SAR vessels)
  • Hopper barges
  • Hydrofoils, air cushion vehicles
  • Floating docks and structures classified in a similar manner
  • Ships of war and troopships
  • Wooden ships

Flag Administrations may also involve ships in the Scheme not engaged on international voyages ref. IMO Ship Identification Number Scheme.

2. Company and Registerd Owner

See: IMO Unique Company and Registered Owner Identification Number Scheme

The purpose of the Scheme is to assign a permanent number for identification purposes to each company and registered owner managing ships of 10 GT and above engaged on international voyages. Flag Administrations may also involve ships in the Scheme not engaged on international voyages.

3. Who assigns these unique identifiers?

IHS Maritime & Trade on behalf of the International Maritime Organization (IMO)

 

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