The German ENIGMA coding machine was used to communicate orders from Germany to its deployed U-boats. Early in WWII, the failure to break the ENIGMA code helped lead to significant losses in the Battle of the Atlantic. The Germans believed that the ENIGMA code was unbreakable.
The first break for the Allies came when the British destroyer HMS Bulldog successfully boarded and captured an ENIGMA machine and its code books from the German U-boat U-110 in May, 1941. The capture of the ENIGMA machine significantly aided efforts by cryptoanalysts at Bletchley Park in England, where the main British code decryption efforts were being conducted. Eventually Bletchley Park was able to successfully build a computer that would decode all German Naval communications. This feat, as well as the Allies' success at keeping the knowledge from the Germans that ENIGMA had been captured and broken, led to the major downturn for German U-boats in the Atlantic. By the end of the war, German U-boat losses were 70%.
The Germans were the first to use Submarines in World War 1. Now i believe that the marines now do at times.
. Submarines
Subs (Submarines).
U-boat
military submarines use low frequency antenna that extends from the sail(conning tower.) The message is typed into a computer, then is sent to another submarines antenna that receives it and displays it on a computer.
Yes, German submarines were very effective in both world wars. The Germans built excellent submarines and still do.
The Germans have used submarines in the Atlantic at various times in the past, including today. Atlantic submarine activity was a key theater of both World War I and World War II.
Mercury used as ballast
U boats- for Unterseabooten (under sea boats)
Submarines primarily use Very Low Frequency (VLF) radio waves for communication while submerged. VLF can penetrate water to a limited extent, allowing submarines to receive messages without surfacing. For more secure and longer-range communication, submarines may also use Extremely Low Frequency (ELF) waves, but these are less common due to their limited data transmission capabilities. When on the surface, submarines can use higher frequency bands, such as HF or VHF, for faster communication.
German U-Boats are submarines. In World War 2, the Germans used these submarines to attack in groups of three or more. The Germans called these groups of submarines "wolfpacks". The Americans, British & Canadians also used the name "wolfpack" to refer to a group of German U-Boats.
Microwaves would be a great way to communicate with submarines, but they'd have to surface to use that method of connecting. Surfacing would defeat the purpose of having the submarine out there, and could easily expose it to detection. We do use radio to communicate with submarines, but not microwaves. Microwave energy has a very limited ability to penetrate water. Very low frequencies can penetrate water to a certain extent, though. And that's why we don't bother with microwaves for submarine communication.