International Telecomunication Union

National Technical Information Service.

Material Safety Data Sheet

Restricted Greater Coasting Service.

International Maritime Convention on Communication by Satellite

Passenger Ship Safety Certificate

Conversion

Strategic Petroleum Reserve

Request For Invoice.

(See RNR)

Personal Property Accounting system.

Towing Purposes.

Grounded

Free of Particular Average

Combination passenger/cargo vessel; a vessel specifically designed to carry both containers and conventional cargoes.

National Shipbuilding Initiative.

Port Inboard

Transverse

Royal Institute of Navigation

Pressure