Inishowen fisherman spots submarine off Rathlin
Shaun McClenaghan, who fishes out of the port of Greencastle, posted an image of the vessel on Sunday.
“Submarine just spotted North of Rathlin Island heading south,” he tweeted.
In response to Mr. McClenaghan’s photograph a number of Twitter users suggested that the craft appeared to be a British Astute class nuclear-powered submarine.
The Royal Navy currently operates five Astute class submarines, each of which cost over £1billion to construct.