The term 'Nautical Hello' is a greeting used by sailors and other seafarers. It is typically expressed as 'AHOY!', which is a four-letter word. This term is used to greet someone, usually from a distance, and is often accompanied by a wave or a salute. It is also used to attract attention, such as when a sailor needs help or assistance. The term has been in use since the 17th century and is still widely used today.