COMMUNICATION AT WAR
SIGNAL FLAGS
Before the innovations of telegraphs, telephones, and two-way radios, ships would communicate using signal flags. This universal method that every country used was not only easy to use, it didn't matter what language you spoke either. Signals flags are a uniform set of easily identifiable maritime codes used to convey visual messages and signals between two ships or from ship to shore.
SEMAPHORES
In 1965, Dijkstra suggested Semaphore, which is a very powerful technique for handling parallel processes using a single integer value, known as a semaphore. Semaphore is essentially a non-negative and the mutual vector between threads. This vector is used in the multiprocessing environment to solve the critical segment problem and to achieve phase synchronization.
MORSE CODE
A long-known method of communication is the Morse code. It has been widely used for more than a century and has been used in a number of fields, from landline telegraph systems to radio communications. The use of Morse code today is much less than it used to be, but many radio hams communicating with Morse code are still filled with the lower end of many ham radio bands.
WIG WAG
Wig Wag messaging is one of the earliest ways of contact. Just as the name infers the use of Wig Wag is just waving the flag back and forth. The use of this flag was very innovative and was very handy during combat. It was used to give orders and make the encounter a lot faster and more efficient.
ELECTRONICS
World War II was, in a way, similar to World War I in communication electronics: the most extravagant pre-war projections of military needs quickly proved to represent just a fraction of the real need. The need for all sorts of networking devices and for increased communication efficiency and quantity pyramided beyond the industry's immediate capability. A rise in production facilities became necessary and there were unparalleled research and development in the field of communications-electronics. A new order of priority was imposed on reliable radio contact by the early German blitzkrieg, of tanks and armored divisions.
SIGNAL LAMP
During the Battle of the Atlantic and the initial years of the Second World War, when allied ship convoys needed a clandestine way of communicating with each other in the middle of the threat of German submarine invasion, contact through a signal lamp was especially useful.
TELEPHONES
During WWI, on the Western Front, phones were utilized to communicate between the front lines marines and soldiers and their commanders. During World War II, seeing a Western Union dispatch was dreaded in light of the fact that the War Department, the forerunner to the Department of Defense, utilized the organization to advise groups of the passing of their friends and family serving in the military, Chayet said.
TELEGRAMS
Telegrams were utilized to declare the principal trip in 1903 and the beginning of World War I. During World War II, seeing a Western Union courier was dreaded because the War Department, the antecedent to the Department of Defense, utilized the organization to inform groups of the passing of their friends and family serving in the military, Chayet said.
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ANIMAL MESSENGERS
Animals were additionally regularly the most dependable approach to transport messages. 100,000 transporter pigeons were utilized as couriers during the war. Pigeons consistently flew home when released, so the soldiers ensured the pigeons' homes were in spots they expected to send messages.
PHONETIC ALPHABET
To dodge disarray from letters that sound the same, the military presented a phonetic alphabet in WWII where letters were articulated as particular words. For instance, the Naval force would be "Nan Able Victor Yoke". The phonetic alphabet was utilized all through WWII, yet was later supplanted by a NATO set in 1957.