The Fascinating History and Functions of Portholes on Ships

A porthole is a small window or opening in the hull of a ship, typically located near the waterline, that allows access to the outside of the ship. Portholes were originally used on sailing ships to provide light and ventilation to the interior of the vessel, but they have since been adapted for use on modern ships as well.

Portholes can be round, square, or rectangular in shape, and they are usually fitted with a glass or plastic window to protect against the elements. Some portholes are operable, meaning they can be opened and closed to control the amount of light and air entering the ship, while others are fixed in place.

Portholes are often used on cruise ships, ferries, and other passenger vessels to provide passengers with a view of the outside world while they are on board. They can also be found on military vessels, where they may be used for observation or as a means of escape in an emergency.