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.
A Petty Officer Third Class is an E4. He or she would be equivalent to an Army or Marine Corporal. A Petty Officer is considered an NCO in other branches. They are junior leaders. They would be in charge of small working parties and minor details. They could have a few people working under them in a department or division. They aren't quite ready to be an LPO (Leading Petty Officer) but they do play a leadership role.