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.
Normally, at that stage in a flight, the copilot, or second officer, would have been in charge. In boarding aircraft with a single hatch, the pilot enters first, followed by the copilot and other members of the crew. Ensign Thomas came aboard and took his place beside his copilot. O'Malley and Allison dragged the copilot back and crowded him into the narrow rear compartment with the others.