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The Operating Mass of an aircraft is:
  • A
    Basic Empty Mass plus the special operational equipment.
  • B
    Take-off Mass minus the trip fuel mass.
  • C
    Dry Operating Mass plus the take-off fuel mass.
  • D
    Dry Operating Mass plus the trip fuel mass.

Operating Mass (OM): It is the DOM plus takeoff fuel but without traffic load. It can be thought of as Wet Operating Mass as opposed to DOM.

Traffic Load: It is the total mass of passengers, baggage and cargo, including any 'non-revenue' load (like spare parts etc)

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