The most common shapes are called open-ended spanner and ring spanner. The term wrench is generally used for tools that turn non-fastening devices (e.g. tap wrench and pipe wrench), or may be used for a monkey wrench - an adjustable spanner. In North American English, wrench is the standard term.
The definition of first mate is the person on a boat that is second in charge after the captain. An example of first mate is the person who gives orders while the captain is busy. first mate. first mate.
A boatswain's mate (BM) is the most versatile member of the Coast Guard's operational team, and a master of seamanship. BMs are capable of performing almost any task in connection with deck maintenance, small boat operations, navigation, and supervising all personnel assigned to a ship's deck force or shore unit.