Glossary
| Reefer | A container carrying vessel specially constructed to carry refrigerated cargo. |
| REG | Red Ensign Group (REG), Includes the 5 Category 1 British Registers (UK, Bermuda, Cayman, Gibraltar and Isle of Man) and the 8 Category 2 British Registers (Anguilla, British Virgin Islands, Falkland Islands, Guernsey, Jersey, Montserrat, St. Helena and Turks and Caicos Islands). The Category 1 Registries may register vessels of any size, type or age whilst the Category 2 Registries are restricted to registering vessels up 150 GT (the British Virgin Islands can register cargo vessels up to 150 gross tones and yachts up to 500 gross tones). The REG meets annually in one of the member countries. |
| Representative Person | Under section 5 of the Merchant Shipping Law (2005 Revision) a ship owned by a non-resident individual or company may only be registered if a Representative Person is appointed locally for the purpose of receiving notices and other documents pertaining to the non-resident ship-owner. A non-resident company is defined as a company that is not incorporated locally and does not having a place of business in the Cayman Islands. See also Authorised Person. |
| RINA | Registro Italiano Navale |
| Ro-Ro (Roll On - Roll Off) | A ship that is constructed to allow cargo to be driven directly on and off board using trucks, forklifts and other equipment. |
| RSO | Recognised Security Organisation |