In SH2 the Scapa Flow mission allowed you to sneak into Scapa flow through the pass between Orney and Lambs Holm just as the U47 did. After the attack the British built the causeways which blocked any further entry through those channels. In SH3 they are blocked on all maps forcing you to go south and enter the channel.
"World War II
During World War II, the Home Fleet was based at Scapa Flow, from where it helped to protect the Arctic Convoys to Murmansk.
In October, 1939, only a month after war had been declared, an assault on Scapa Flow was planned using the U-Boat U-47, commanded by Lieutenant Günther Prien. On the night of October 13th, the U-Boat managed to pass between the Orkney Mainland and Lamb Holm into Scapa Flow, between two northerly blockships. Just after midnight HMS Royal Oak was sighted in Scapa Bay. Torpedoes were fired, and a hole 30 feet in diameter was made in the hull, and she capsized. Of the crew of 1400 men, 833 lost their lives.
HMS Royal Oak is a protected war grave, and each year on the anniversary of the sinking, there are memorial services.
Churchill Barrier © Doug HoughtonFollowing this event, Scapa Flow became heavily defended with anti-aircraft batteries, minefields and further blockships. In 1940, Winston Churchill gave orders that the defences on the eastern side of Scapa Flow were to be improved by setting concrete blocks between islands to make causeways. These four causeways are known as the Churchill Barriers (picture, left)"
Any comments about this or am I missing something here? Anyway to modify the map to allow the historical egress?