The difference between portholes on ships and general windows
Sep 10, 2021
Marine side scuttles refer to round windows with watertightness that are located on the side shells, superstructures and outer walls of deckhouses.
The ship’s side scuttle, together with its glass and side scuttle cover, should be of a solid structure, and should be able to close effectively and ensure watertightness.
According to the maximum allowable pressure, it is divided into heavy portholes (with storm cover), medium portholes (with storm cover), and light portholes.
Heavy-duty side scuttles are used below the freeboard deck and above the full-loaded waterline where the side openings are allowed, and where watertight and airtight are required.
Medium portholes are used for the side or the end of the superstructure above the freeboard deck of passenger ships, and the sides and ends of the first superstructure on the freeboard deck of non-passenger ships.
Light portholes are used for the sides and rear ends of the superstructures above the first deck above the freeboard deck of passenger ships, and the side and rear ends of the surrounding walls above the first superstructure above the freeboard deck of non-passenger ships.
General marine windows can only be installed on the outer walls of the superstructure and deckhouses above the ship’s freeboard deck. Below the freeboard space, the first-story superstructure or the first-story deckhouse whose sidewall is within 1.2m from the side of the ship shall not be equipped with ordinary marine windows.
