What is crows nest on a ship?

A crow's nest is a small lookout platform located at the top of the tallest mast on a ship. It was often used by sailors to observe the surrounding sea in search of any potential dangers or obstacles in the ship's path. The crow's nest was a vital part of a ship's navigation and helped prevent collisions and other accidents at sea. It was typically made of wood or metal and often had a ladder or rope ladder to access it. Today, with advanced technology and radar systems, the use of crow's nest on modern ships has become less common.