Would say that NATO co-ordinate intercepts but someone else can answer for sure.
Have to side with Jon the DC9 jockey on this one. Not because I'm critical of other pilots and think that I can always do better, far from it. I make mant errors myself for which I retropesctively slap myself on the forehead. No, I side with the old smoke maker because we need to be alert. If we start to justify our mistakes we are on a VERY slippery slope. I haven't been intercepted yet but been 'victim' of one of the afore mentioned events leading to a loss of radio contact. MY mistake, no-one else's. It will happen to others and probably to you. Be a professional and be alert (even at 2 a.m.) so that you don't look like a weekend warrior.
Up to you but 121.5 is REALLY easy to listen to. (Don't know who's transmitting a 'practice' pan-pan but if you're listening, this can be done without pressing the PTT.)
Cheers,
Chips