Hawsehole is a nautical term for a small hole in the hull of a ship through which hawsers may be passed. A hull is the body of a Ship or Boat. It is a central concept in floating vessels as it provides the Buoyancy that keeps the vessel from sinking Hawser is a nautical term for a thick cable or rope used in mooring or towing a ship [1] Also known as a cat hole. [2] In the British Navy, an officer who had served as a seaman before being promoted was said to have "come in through the hawsehole. "