critical speed

critical speed of flow

supersonic speed (exceeds speed of sound / Mach 1)

variable-speed with speed control

instantaneous vertical speed indicator / instantaneous vertical-speed indicator (IVSI)

Nr gauge (Nr = speed of rotation) / rotor speed sensor

Motor PWM speed separated from PID speed

commander’s critical information requirements (CCIR)

critical area

critical asset list (CAL)

critical avenue of approach

critical infrastructure

critical infrastructure protection (CIP)

critical intelligence

critical item

critical mass

critical mission

critical point

critical program information

critical sector

critical shortage

critical skill

critical supplies and materials

critical target

critical terrain

critical time

critical variables

high-priority critical assets

mean time between critical failure (MTBCF)

prioritized critical asset list (PCAL)

critical friendly zone (CFZ)

critical non-conformity

individual critical task list (ICTL)