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Fatigue Management

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The men are, of course, very sleepy... but every hour that we<br />

are left unmolested is improving their condition.<br />

Lieutenant-General Sir John Monash<br />

noting the condition of A.I.F. Troops<br />

cited in Geoffrey Serle's<br />

John Monash: A Biography, 1982<br />

Fortunately, small amounts of sleep, compared<br />

to actual sleep loss, can dramatically improve<br />

performance. After 24 hours of SusOps, four<br />

hours of uninterrupted sleep should promote<br />

adequate recovery. This time may be<br />

insufficient if subsequent mental performance,<br />

as opposed to physical performance, is<br />

required. Following 36 to 48 hours of SusOps, a<br />

block of at least six hours of sleep should be<br />

allowed for recovery. After 48 hours or more of sustained operations,<br />

personnel should be allowed to sleep until ‘spontaneous’ awakening or for up<br />

to 10 hours. Longer periods of sleep are not recommended as sleep<br />

‘drunkenness’ and disruption to circadian rhythm may occur. For similar<br />

reasons, further sleep periods should not occur for at least 12 hours. If<br />

exhaustion is severe, watch for unsafe sleeping practices. Soldiers may fall<br />

asleep in potentially dangerous locations. Attempt to provide supervision<br />

especially if vehicles are in the area.<br />

Next morning I woke in quiet calm, restored by the miracle<br />

of sleep. We had reached Menari before the Japanese, and<br />

my fears had been the creatures of exhaustion.<br />

Henry Steward<br />

Recollections of a Regimental<br />

Medical Officer, 1983<br />

86

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