Operation Fish, the transfer of British wealth to Canada, and was under the strictest secrecy, with the crew were outfitted with tropical whites to confuse German agents. In the company of the two old battleships, and , her sister ship, Enterprise, and the old cruiser , she ran into some of the heaviest seas that Agar encountered. By the time they reached Halifax the Emerald had lost her ship's boats, rafts and various depth charges, wires, shackles and other valuable equipment, not to mention her spotter plane, a Fairey Seafox. Upon arrival in Halifax, Emerald was assigned to North Atlantic convoy escort duty for the return voyage. The large convoy was filled with American munitions for the war effort. Since the Emerald had been designed and equipped for work in gentler climates this was very uncomfortable as well as dangerous duty. The Canadian Red Cross provided a large supply of warm gloves, woolen scarves, sea boot stockings, leather headgear lined with wool and fur, and woolen underwear, for the crew were ill-equipped to face winter storms with their tropical gear. The convoy lost two merchant ships to U-boats on the trip to the United Kingdom. Among the convoys Emerald escorted was the first Canadian troop convoy, in November 1939, when 7,500 troops reached Britain without incident. Convoy duty continued through the bitter winter of 1939/40. Agar's tour of duty as captain of the Emerald was completed in June 1940 after escorting a contingent of Canadian soldiers in the SS Empress of Australia to occupy Iceland. In the Clyde he handed over command of his beloved ship and departed with the cheers of his officers and crew ringing in his ears. He was then assigned to command the destroyer leader as head of the 16th Destroyer Flotilla based at Harwich. It was the first assignment in six months on temporary duty. Operation Lucid Agar was in charge of the planning and execution of Operation Lucid in September 1940, an attempt to hit the German wooden invasion barges at Boulogne and Calais, France, with incendiary material and set them alight. It was a desperate time and any measure, however risky, that could frustrate the German invasion plans was welcome. The plan had the personal backing of Winston Churchill. Accompanied by various auxiliary vessels, Agar set off for Boulogne several times in September and October 1940 with four small ancient oil tankers filled