A minimum launch interval of 30 seconds is used between aircraft, which climb straight ahead.

This would act to further increase the total separation between aircraft, in both horizontal and vertical aspects.

The time lag between aircraft and the guy on the ground is just too great to make for effective combat.

This was to avoid any possible encounter between Italian-manned aircraft fighting on opposite sides.

Ground effect vehicles, which straddle the line between aircraft and ship, have also been proposed for the role in the past.

Travelers also may now use covered walkways between aircraft and terminal.

The A-10s separated from their interval of only a few feet to an extended attack formation that left miles between aircraft.

They've also got much better communications between aircraft.

A series of alarms sound if adequate space between aircraft is not maintained.

A distinction has since been drawn between aircraft and a structure which overhangs land.