On ships, the term 'On Deck' is used to refer to the area of the ship located on the topmost deck. This area is also known as 'Topside', which is a 7-letter word that can be used to solve the crossword puzzle. On Deck or Topside is the highest point of the ship and is usually the most exposed to the elements. It is the area where the crew and passengers spend most of their time, and it is also the area where the ship's navigation and communication equipment are located.