SMS Gneisenau (1879)
The crew attempted to drop the starboard anchor, but it did not catch in the stony ground. "Gneisenau" was driven into the mole repeatedly, striking it with her stern twice before being turned and pushed bow-first on the starboard side, forcing her aground. A merchant ship attempted to come to the crew's aid, but they were unable to connect a line between the two ships before "Gneisenau" began to list 35 degrees. A boat from shore also attempted to rescue the crew, but it too was forced ashore in the heavy seas. Wave action quickly smashed "Gneisenau"s hull against the mole, and part of her crew attempted to find safety by climbing the rigging. The ship rolled over onto her side, and the surviving crewmen reached shore with a line. Forty-one men were killed in the accident, including Kretschmann and the ship's first officer. "Charlotte" and the British ironclad were sent to aid the wounded. Those killed in the sinking were buried in Málaga's cemetery, and the survivors returned to Germany aboard the HAPAG steamship on 2 January 1901.
B-Dienst
In 1941, two investigations of Naval Enigma cypher security were undertaken. By March and April 1941, when Naval Code was broken, B-Dienst again started deciphering British convoy messages, and generally knew convoy locations. However, when several U-boats failed to locate an expected convoy, Dönitz suspected that the Allies had discovered the range of at least one U-boat patrol area. In April 1941, he ordered the need-to-know list to be made as small as possible. He also restricted the number of radio relay and sending stations transmitting U-boat messages. In addition, he asked the Marine Command for a special, separate U-boat Enigma key, which according to official Kriegsmarine history was the TRITON key, but according to the Historian Ralph Erskine, was an upgraded key.
The sinking of the battleship "Bismarck" on 27 May 1941 caused great consternation in the Kriegsmarine. Around the end of May, British Admiralty was reading Enigma messages with a delay of two to three days and was actively searching for "Bismarck" support shipping, and they found and sunk them. By 21 June 1941, they had sunk the tanker "Belchen", the tanker "Esso Hamburg" scuttled by her crew after taking fire from HMS London and HMS Brilliant on 4 June, the supply ship "Egerland" Although the British Admiralty had intelligence on the location of the tanker "Gedania" and the ex-Norwegian scout Gonzenheim, they had ensured they were not sunk, to ensure that Kriegsmarine suspicions were not raised. However, the Royal Navy accidentally came across the "Gonzenheim" and "Gedania" and immediately sank them on 21 June 1941.