On board the Royal Navy offshore patrol vessel Orkney (1976) in the East Shetlands Basin looking forward and to starboard from the open bridge while patrolling the U.K. 200 nautical mile economic exclusion zone in the North Sea. The ship's 40 mm bofors gun is in the foreground. An oil rig with two platforms is under construction in the distance and an offshore supply vessel is close to it. This is said to be in the Brent Field. A vertical format negative.