Commercial property. The term commercial property (also called commercial real estate, investment or income property) refers to buildings or land intended to generate a profit, either from capital gain or rental income.
Flight management system. A flight management system (FMS) is a fundamental component of a modern airliner's avionics. An FMS is a specialized computer system that automates a wide variety of in-flight tasks, reducing the workload on the flight crew to the point that modern civilian aircraft no longer carry flight engineers or navigators. A primary function is in-flight management of the flight plan.
Air navigation. A relatively modern Boeing 737 Flight Management System (FMS) flight deck unit, which automates many air navigation tasks. The basic principles of air navigation are identical to general navigation, which includes the process of planning, recording, and controlling the movement of a craft from one place to another.