I believe it’s called Speedwell, a fishing boat with the registration CN318 departing from Port Askaig, the Paps of Jura in the background.
Fishing boat CN318 off Port Askaig, Isle of Islay
Islay Pictures Photoblog
Pictures from the Isle of Islay, Scotland
Good zoom, were you on the water yourself or was the air just very clear?
Taken from the pier. It was fairly clear, the rest is post processing