Tonight I watched Nova's "The Impossible Flight", a documentary film about the around the world Solar Impulse project where a solo pilot set the world's record for a 5 day non-stop flight from Japan to Hawaii with a ~35mph TAS! The documentary showed the pilot practicing 20min naps and said "this is a technique military fighter pilots are taught...". (It is supposed to keep them from going into a deep sleep)
Many commercial sleep questions have been answered on stack such as;
Is a pilot allowed to sleep during a flight?
How are emergencies handled during In-Seat Rest?
So this question pertains to military pilots.
- Is this practice common among most nations?
- How is a fighter pilot woke up?
- Is there a alarm in the radio system?
- Does an air or ground controller wake them?
- Or perhaps the documentary was misleading and only sleep is allowed with two or more crews?