- The vessel must be structurally adequate for the intended voyage.
- The vessel has adequate stability for its intended service.
- The vessel has a hull that is watertight from keel to freeboard deck and weather-tight above the freeboard deck.
- The working area for the crew is high enough for safe movement of the crew during adverse weather or else catwalk or lifelines must be provided.
- The vessel must have enough reserve buoyancy above the water line.
