Displayed background gamma radiation level is 9.8 Î¼R/h (0.82 mSv/a) This is very close to the world average background radiation of 0.87 mSv/a from cosmic and terrestrial sources. Displays showing ambient radiation fields of 0.120-0.130 Î¼Sv/h (1.05-1.14 mSv/a) in a nuclear power plant.This reading includes natural background from cosmic and terrestrial sources, but excludes any contribution from contamination in the air, food, and water.isplays showing ambient radiation fields of 0.120-0.130 Î¼Sv/h (1.05-1.14 mSv/a) in a nuclear power plant. This reading includes natural background from cosmic and terrestrial sources, but excludes any contribution from contamination in the air, food, and water.
In some countries, the more senior rank of Commodore is also included. In others Lieutenant-Commanders, as equivalents to army and marine Majors, are considered senior officers. Commonwealth air force senior officer ranks include Group Captain, Wing Commander, and Squadron Leader, where such ranks are still used.
An old adage in the U.S. Army and the U.S. Marine Corps is that sergeants actually run everything. In both the Army and the Marines, a sergeant major is the most senior sergeant and holds the enlisted paygrade of E9. Sergeants major are typically the senior enlisted advisors to the officers commanding their units. In most cases, a sergeant major is also responsible for much of the direction and performance of the enlisted personnel within his military unit.