True, true - but thinking back there was never a second ship around to have raised the question so it only ever happened with one ship being in the arc and we never looked into that much detail (the others were off in the starboard arc pounding on the Nova and wondering why running broadside to a Nova was a bad idea IIRC) - but the first time the Omega had one target both fore and aft so we all shrugged and went 'what the hey we'll let each end open up on the one order'.....someone muttered something sounding at least pseudo-scientific about gravity lensing from the nearby planet and we went with that.
We only found that special order in P&P just before that session so I was fairly sure we weren't playing it right - but everyone was happy with how we were playing it - which just made us rattle along and we had novices in game so its easy to correct in the future.
The group was never fond of Boresights - not as a conceptual issue but a practical one, too much extreme measuring and too many jogged tables - so we settle on the line and everyone agree its lined up and play from there - though I, as ref, had to have stern words with one player a while back who was of a more....competitive.....mindset and said 'well they declared it, but I never agreed to it, I simply agreed that they were declaring it' and that did kind of make people a bit leery of such a precise arc (though to be fair it was really an attitude they needed to be wary of, not a firing arc).