Tank
With World War II the multi-turreted tanks proved impracticable, and as the single turret on a low hull design became standard, crews became standardized around a crew of four or five. In those tanks with a fifth crew member, usually three were located in the turret (as described above) while the fifth was most often seated in the hull next to the driver, and operated the hull machine gun in addition to acting as a co-driver or radio operator. Well-designed crew stations, giving proper considerations to comfort and ergonomics, are an important factor in the combat effectiveness of a tank, as it limits fatigue and speeds up individual actions.
Air Naval Gunfire Liaison Company
ANGLICO is never assigned its own physical battlespace as teams are constantly on the move. An ANGLICO inherits its AO from whichever unit it supports. A Firepower Control Team in Iraq, for example, consists of no more than four to five men. The fifth man is needed to man the gun turret during a vehicle mounted mission. The primary member is a Forward Air Controller (FAC) or a Joint Terminal Attack Controller (JTAC). A radio operator and artillery observer will compose two of the three remaining team members, with the last member often being a squad automatic weapon (SAW) gunner. Even though each team member has their own specialty, ANGLICO Marines are all cross-trained within their team. This high level of training and proficiency is what makes ANGLICO units so effective.