Abbreviations
| OA |
Onassis Archive |
| s/s |
steamship |
| grt |
The gross registered tonnage of a ship is a measure of the internal volume of all enclosed spaces and is equal to the tonnage below the upper deck of the ship. One grt equals 100 cubic feet or 2.83 cubic meters. |
| nrt |
Net registered tonnage is the residual tonnage after the deduction of spaces for crew accommodation, navigation and propulsion. |
| dwt |
deadweight tonnage provides the most accurate measurement of carrying capacity. The carrying capacity of a vessel is expressed in tons of 2,240 lbs. The deadweight capacity is equal to the difference between the vessels displacement in salt water when loaded and the displacement on her light draught. The draught of a vessel is the vertical distance between the waterline and the keel. For rough calculations one assumes that 1 grt = 1.5 dwt. |