International Salvage Union

Information technology

Independent Tank

Italy (Flag)

Integrated Tug Barge

Independent Tank, Center

International Tonnage Convention

International Trade Commission

International Transport Workers Federation

International Tanker Owners Pollution Federation

International Telecomunication Union

Independent Tank, Wing

Iraqi Territorial Water Services.

Independent Tank, Common

Inshore Traffic Zone. Navigational lane which lies between a TSS and the coast. Can only be used by ships calling a port or place inside the zone.

If Used

International Underwiting Association

If Used, Half Time Actually to Count

International Union of Marine Insurance

In Water Survey