The term 'Clean Decks' is a job description for a SWAB, which is a four-letter word. A SWAB is a person who is responsible for cleaning and maintaining the decks of a ship. This includes scrubbing, mopping, and polishing the decks to keep them in good condition. The SWAB must also ensure that the decks are free from debris and other hazards. Additionally, they may be required to perform minor repairs or maintenance on the decks.