| Beam |
Width of a vessel at its widest part |
| Draft |
The depth of the water required to float a vessel |
| Freeboard |
The vertical distance from the waterline to the freeboard deck, usually measured amidships |
| Freeboard Deck |
The uppermost deck that is designed to be watertight |
| GRT (Gross Registered Tonnage) |
The volume, expressed in units of 100 cubic feet to the ton, of a vessel's total enclosed spaces below the weather deck and enclosed spaces above the deck including the bridge and accommodations |
| LOA (Length Overall) |
The length between the forewardmost and the aftermost points on the hull of a vessel |
| LOD (Length on Deck) |
The lenngth between the forwardmost and the aftermost points on a specified deck measured along the deck, excluding sheer |
| LWL (Length on Waterline) |
The length between the forwardmost and the aftermost points on a vessel's waterline |
| Rig Height |
Maximum height of the rig above the waterline |
| Sheer |
The fore-and-aft curvature of a vessel's main deck from bow to stern |
| Sparred Length |
The length between the extremities of any spars that overhang the bow or stern of a vessel, such as a bowsprit or a boomkin |