It is a federal air marshal’s job to maintain security on board of an aircraft. The average salary of a federal air marshal is $45,000. They also have locality pay that varies depending on the area. A field air marshal’s main job is to protect the passengers on major flights from potential terrorists. They also have the responsibility of escorting major criminals, ensuring that the latter do not give the slip under any circumstance. They are expected to be on airplanes for about 181 days a year and five hours a day. They are well trained in using different types of guns.