ShotOne - just because civil air traffic (CAT) listen out on 121.5 doesn't really help much to speed up the likely SAR scramble. As here there was confusion between ELT/PLB reports by a Speedbird near Stornoway and a Loganair near Wick.
What is so hugely depressing it that the MOD has not addressed this effectively by a suitable off-the-shelf procurement plan. I no longer fly so I am not up to date here but I'd be interested to see what other air forces do. I can't imagine RCAF or USAF aircrew being happy to operate in northern Canada/Alaska with the same kit the RAF use.
MB