The first officer is the co-pilot to a captain on board an aircraft. The first officer is second in command of the aircraft to the captain, and would take over from the captain should they become incapacitated during a flight.
The day-to-day schedule of a first officer can vary greatly. As a first officer your tasks can include running routine checks of all the safety equipment on board, briefing cabin crew, liaising with air traffic control to coordinate take-off and reacting to changing weather conditions and adjusting the flight plan accordingly.
Salary
Starting salary: £20,000 to £30,000
Experienced co-pilot or captain: £38,000 to £90,000
Experienced captain: £140,000+
Average salary in the UK: £58,964.69