After completing his Dunkirk painting and a number of other short-term commissions for WAAC, Eurich was given a full-time commission to paint Admiralty subjects. This commission lasted from 1941 to 1945 during which time he painted, sometimes, epic reconstructions of battle scenes, depictions of survival stories and also simpler paintings of ships and boats. Some of these works were based on locations and vessels Eurich was familiar with, such as his paintings of British fishing boats and of naval actions off the south coast of England. To ensure accuracy, Eurich made several trips on destroyers patrolling the Straits of Dover during the war. Other paintings were based on photographs and eyewitness accounts and some were wholly works of imagination. This last category included "Survivors From a Torpedoed Ship" showing exhausted men clinging to the upturned hull of their lifeboat. Although the painting was greatly praised, by Winston Churchill among others, WAAC quickly withdrew it from public display fearing it would adversely affect recruitment to the Merchant Navy. Eurich painted reconstructions of British Commando raids on Vaagso, Bruneval and Dieppe. For the Dieppe raid, Eurich was given access to the operations room for the attack and listened to the British radio communications as events developed. During the war, Eurich also painted scenes representing the D-Day landings, the Battle of Salerno, the wreck of the "Tirpitz" and air attacks on a convoy. In total during the war, Eurich completed some 34 oil paintings and one drawing for WAAC.