Or are you postulating they were responding to the rad alt??
Just to make a simple point. This is the Rad Alt that, according to MoD, was both faulty and defective - and yet apparently fully serviceable. (My brain hurts).
When asked to provide details of both fault and defect investigations (two entirely different things) MoD conspired (!) to claim no knowledge, thereby concealing (!) vital information on systemic airworthiness process failures.
Ah, AN/APN198 Radar Altimeter. Now that is a piece of kit with a chequered history, to say the least.