walter K
Did you not use the DME function of the Macrihanish TACAN for getting up close and personal with the Mull?
I refer to my previous post (now a long way back). Machrihanish as a military base was in the process of closing down. They had already pulled the plug on all or most of the radar services - which we only found out a day or two before on arriving for a radar service. Unfortunately I can't answer for TACAN/DME - Walter Wessex didn't have much on the electronic nav aid side of things at that stage - but that could just have easily been switched off even as the crew were using/relying on it!