Glossary of Terms
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‘Mach number’ means the ratio of true air speed to the speed of sound.
Magnetic variation. The angular difference between True North and Magnetic North.
‘Main rotor(s)’ means the rotor or rotors that supply the principal lift to a rotorcraft
MALSF - Medium-intensity Approach Lighting System with Sequenced Flashing lights
MALSR - Medium-intensity Approach Lighting System with Runway Alignment Indicator Lights
‘Manifold Pressure’ piston engines means the absolute static pressure measured at the appropriate point in the induction system, usually in inches or millimetres of mercury.
“manoeuvring area” means that part of an aerodrome used for the take-off, landing and
Marker. An object displayed above ground level in order to indicate an obstacle or delineate a boundary.
Master Minimum Equipment list (MMEL)
“Master Minimum Equipment list (MMEL)” means a list established for a particular