vertical field of fire
вертикальний сектор обстрілу
вертикальний сектор обстрілу
instantaneous vertical speed indicator / instantaneous vertical-speed indicator (IVSI)
slant fire; diagonal fire; oblique fire; fire to the oblique
live-fire training (field-fire training)
field officer (field-grade officer / senior officer)
air support field pack, field pack air support, airborne / para (air support) / Pathfinder Bergen
fire control orders (FCO) ('Hold Fire', 'Cease Fire' and 'Engage')