offshore vessel nautic.

[definite]

Подскажите, пожалуйста, как правильно перевести "offshore vessel" (тип судна) в следующей фразе:

The offshore vessel M/V Troms Vision, NB339, was recently delivered from Kleven Verft in Norway to its owners Troms Offshore AS.

Неясно также, что такое "NB339".

Само судно вот: http://www.tromsoffshore.no/en/fleet/mv-troms-vision/

[SAKHstasia]

Там в описании PSV - PLatform Supply Vessel .
A Platform supply vessel (often abbreviated as PSV) is a ship specially designed to supply offshore oil platforms. These ships range from 65 to 350 feet in length and accomplish a variety of tasks. The primary function for most of these vessels is transportation of goods and personnel to and from offshore oil platforms and other offshore structures.
Я думаю это судно снабжения морских (буровых) платформ

[definite]

Большое спасибо!