
The term comes from the general nautical usage of rating to refer to a seaman's class or grade as recorded in the ship's books.

In the Royal Navy and other navies in the Commonwealth, rate and rating are interchangeably used to refer to an enlisted sailor who is ranked below warrant officers and commissioned officers but may include petty officers and chief petty officers. Depending on the country and navy that uses it, the exact term and the range of ranks that it refers to may vary. In a navy, a rate, rating or bluejacket is a junior enlisted sailor who is not a warrant officer or commissioned officer. The man with a sword is a commissioned officer, as is the man on the ladder with the telescope. A 19th-century caricature portraying ratings on a Royal Navy ship. Not to be confused with Rating system of the Royal Navy.
