Definition of AVAILABILITY. 1. : the quality or state of being available. 2. : an available person or thing.
Definition of EXECUTIVE OFFICER. : the officer second in command of a military or naval organization or vessel. ADVERTISEMENT. the officer second in command of a military or naval organization or vessel. ADVERTISEMENT.
In most non-naval military services that are land-based (except the U.S. Army, where an executive officer is the second-in-command at the company/battery/troop and battalion/squadron level) or in joint military organizations, the executive officer is an administrative staff position versus a command position.he US Air Force uses the term executive officer for officers assigned as personal staff officers to general officers. Their role is similar to aides-de-camp in the US Army, Marine Corps and Air Force and flag aides and flag lieutenants in the US Navy and Coast Guard.