Что такое AIR SOURCE?

[pupkinvasya]

Battlefield Operations: Falcon 4.0 Allied Force. 17mb.
http://www.f-16.net/downloads_file11.html

Air Source

Where Air for pressurising of the cockpit and fuel tanks come from. There are four settings. This controls pressurising of the cockpit and fuel tanks. The external fuel tanks require pressurising to allow the transfer system to work.

Off - no pressurisation.
Norm - normal pressurisation for cockpit and external tanks.
Dump - dump all cabin pressure but pressurises the fuel tank.
Ram - external tanks are not pressurised.