The term 'BOOM SUPPORTS' can be summarized as a type of nautical structure consisting of MASTS. MASTS are tall, vertical poles used to support sails on a boat or ship. They are also used to hold up other structures such as radio antennas and navigation lights. The term 'BOOM SUPPORTS' is often used to refer to the MASTS that are used to support the boom, which is a horizontal pole used to control the angle of the sail.