V
Valuable Cargo
A cargo consignment that contains one or more valuable articles (specified in the IATA Cargo Services Conference Resolutions Manual, Resolution 012 or the IATA Security Manual 3.11.2).
Vendor
See Supplier.
Visual Inspection
A visual inspection either directly or by the assistance of a suitable apparatus to determine the state of an area or part.
Visual Meteorological Conditions (VMC)
Meteorological conditions expressed in terms of visibility, distance from cloud, and ceiling, equal to or better than specified minima.

W
Wake Turbulence
Turbulence that forms behind an aircraft as it passes through the air, resulting from vortices formed as the wings produce lift.
Equivalent Terms: Wingtip Vortices, Jet Wash Wet Drill
A practical training exercise whereby crew members get into a life raft that is in the water, either by climbing into the raft from the water or boarding the raft directly from an aircraft exit.
Wet-lease
The practice whereby an airline (lessee) satisfies its own operational needs by utilising equipment (e.g. aircraft) that is acquired from an external operator or entity (lessor) through a lease agreement; such equipment is then operated and supported by the lessor.
Equivalent Terms: Capacity Purchase Agreement Windshear
A difference in wind speed or direction between two points in the atmosphere; a difference between two points are at different altitudes is vertical shear; a difference at two points geographically is horizontal shear.