(розм.) парашут (у ранці)
compression sack, stuff sack
daysack, assault sack / pack, patrol / day pack, Northern Ireland (NI) patrol sack
engineering sack, other arms Bergen, turtle backpack
hit the sack
sack
sack dummy
sack duty (hours, time)
sack rat
Sad Sack
snore sack
day sack
fart sack
jump an aircraft
jump area
jump lead
jump light
jump master (jumpmaster)
jump training
jump-down satellite
jump-jet
jump-start
make a jump
parachute jump / leap
ski-jump
ski-jump ramp flight deck
water-jump
halo jump
jump smock
barrel-jump correction
vertical jump
jump of barrel
jump the sprocket wheel