нульова висота нижньої крайки хмарності
operational ceiling (service ceiling)
static ceiling (the highest altitude at which the helicopter is capable of hovering in standard atmosphere) / hover ceiling
zero-zero landing
zero-zero weather
absolute ceiling (AC)
ceiling (aeronautics)
service ceiling
ceiling lining
ceiling
ceiling altitude
hover ceiling
static ceiling
low ceiling
minimum ceiling
operating ceiling
unlimited ceiling
smoke ceiling
ceiling in rank
ceiling height
manpower ceiling
battlesight zero (BZO)
ground zero (GZ)
vision nil (zero)
zero elevation
zero in on
zero shot
zero tolerance
zero visibility
zero zone
zero-in
zero dark thirty
zero lead homing