aircraft clearance

He called charter aircraft clearance.

Cargo Helicopter loadmasters provide aircraft clearance information and direct pilots to safe positions when landing and taking off.

Most often the offset threshold is in place to give arriving aircraft clearance over an obstruction while still allowing departing aircraft the maximum amount of runway available.

These radio operators have no authority to give aircraft clearances or instructions, but they can issue advisories to let them know about weather conditions, runway conditions, traffic, and other concerns.

Unlike the Minimum safe altitude used for IFR flight, the MEF does not include any margin for aircraft clearance above the terrain nor for altimeter error.