The nuclear submarines are in the Clyde if I remember rightly, in Gearr Loch. (My wife’s boss had a house more or less right opposite them on the other side of the water, he was on the Clynder peninsula looking eastwards.) That’s about 90 miles south of me on the West Coast.
I am on the west side of Skye, IV499BN, but I am so high up that I can see the sea on both sides, the atlantic to the south west and the Linne Shléibhteach - the channel that separates Skye from the mainland. I see Loch Shubhairne and the mainland mountains to the east, quite close. I am wondering now if this is the only place where you can see both seas, not sure. It isn't possible from some places further down the bank when you descend southwards towards the Atlantic because you lose the eastern view because of ground nearby rising up slightly.