The complete list of ships attacked up to June 20 is as follows: The complete list of ships attacked up to June 20 is as follows:
| H. Haskell, schooner, 1,362 tons. |
| Isabel B. Wiley, schooner, 611 tons. |
| Hattie Dunn, schooner, 365 tons. |
| Edward H. Cole, schooner, 1,791 tons, subsequently raised and saved. |
| Herbert L. Pratt, tank steamer, 7,200 tons. |
| Carolina, passenger steamer, 5,093 tons. |
| Winneconne, freighter, 1,869 tons. |
| Hauppauge, auxiliary schooner, 1,500 tons. |
| Edna, schooner, 325 tons, subsequently towed in. |
| Texel, steamship, 3,210 tons. |
| Samuel M. Hathaway, schooner, 1,038 tons. |
| Samuel C. Mengel, schooner, 700 tons, unconfirmed. |
| Edward Baird, schooner, 279 tons. |
| Eidsvold, Norwegian steamship, 1,570 tons. |
| Harpathean, British steamship, 4,588 tons. |
| Vinland, Norwegian steamship, 1,143 tons. |
| Desauss, schooner, 500 tons. |
| Pinar del Rio, steamship, 2,504 tons. |
| Vindeggen, Norwegian steamship, 2,632 tons. |
| Henrik Lund, Norwegian steamship, 4,322 tons. |
| One seagoing and two coal barges, which struck mines. |
All the ships mentioned were sunk except the Herbert L. Pratt and the Edna. Most of them were destroyed by bombs placed alongside after the crews had left. In some cases gunfire was used. The submarine also laid mines, which caused some damage. The commander of the submarine was reported as saying that he was saving his torpedoes for bigger ships. With the exception of the British and Norwegian vessels all were American. The raid extended along the coast from within a couple of hundred miles of New York southward as far as the entrance to Chesapeake Bay.
HUNTING THE RAIDER
As soon as the first news was received that a submarine campaign was being conducted off the American coast, prompt action was taken by the Navy Department. Destroyers, submarine chasers, and airplanes were sent out in large numbers to patrol the coast and search the neighboring waters, but the U-boat eluded detection. New York Harbor was temporarily closed, and, though there was no indication of the presence of hostile airplanes, the lighting of the city was for several nights diminished by darkening the main thoroughfares. There were rumors that the submarine either had a "mother ship" or was using a base on the Mexican coast. Marine insurance rates were not raised, but the officers of vessels in the coastwise trade were granted a bonus by the Shipping Board.
Other Submarine Activities of the Month
The British Admiralty's official statement of all losses of shipping during the month of April, 1918, shows that 220,709 tons of British and 84,393 tons of allied and neutral vessels, a total of 305,102 tons, were destroyed by submarines and lost by accident. The total for the preceding month was 381,631 tons. In April, 1917, the total losses amounted to 893,877. April, 1918, showed the lowest figures for any month since the beginning of 1917. Another satisfactory feature of the situation was that 40,000 tons more shipping was built by Great Britain and the United States than was lost during the month.
Georges Leygues, the French Minister of Marine, informed the Army and Navy War Committees of the Senate on May 25 that the means employed to rid the seas of submarines had become increasingly effective since January and had given decisive results. Tremendous strides had recently been made by the Allies in repairing ships damaged by torpedoes or mines. The Minister added that co-ordination between the allied nations had become so smooth during the past four months that the tonnage restored to the sea exceeded 500,000 weekly. Great Britain had repaired 598,000 tons in one week recently, while France had effected repairs upon 260,000 tons in one month. The increased building and more efficient and speedier repair work were constantly bringing better results in the transport of troops and supplies.