On your scorecard you are meant to mark down if you have IR switched on or off.
If you mark your card that the IR is on and it then switches off, you must turn it back on before you take a shot.
I would suggest that you tell your shooting partners that the IR has turned off and that you are switching it back on. Just in case someone sees you messing with your scope.
Gary (UKAHFT chief marshal)
Somehow I made TEAM ENGLAND 2012 and 2013
Illiterate writer for AirGunner
The real Kung Foo Panda.