This was the first successful transatlantic radiotelegraph message in 1902.

In 1895 he began the experiments which would eventually lead to his invention of the radiotelegraph system.

It also had the first radiotelegraph in the continent in 1927.

A Marconi radiotelegraph station was constructed in 1909.

Qualified radiotelegraph operators were rare these days, and the British were far ahead of the Americans in training personnel.

Q code - initially developed for commercial radiotelegraph communication, and later adopted by other radio services, especially amateur radio.

Metcalfe recognized, from behind, Johnny Betts, the American radiotelegraph operator.

The receiving radiotelegraph operators would hear those different duration bursts as buzzing in their headphones and transcribe the sounds back into characters.

Shipboard installations were provided at nominal rental cost or even for free, with the equipment and the radiotelegraph operators provided by United.

Even in his high school days, Weitbrecht was interested in amateur radio and used radiotelegraph to communicate with fellow radio operators around the country.

International Code of Signals (radiotelegraph)

However the Federal Communications Commission still grants commercial radiotelegraph operator licenses to applicants who pass its code and written tests.

Duplex operation-initially developed by Marconi at Letterfrack-quickly became a standard practice for commercial and military radiotelegraph communication.

However, in truth, the limited engineering talents of the United staff never got much beyond the basic spark-gap radiotelegraph systems common to the industry of the day.

Since the 500 kHz band is no longer used for marine communications, some countries permit experimental amateur radio radiotelegraph operations in that band.

While in college he assembled and began selling a digital electronic keyer kit for sending radiotelegraph code for ham radio operators.

The other one, Johnny Betts, from Pittsburgh, a topflight radiotelegraph operator, turned and said, "Roger that."

They provide specific abbreviations for concepts related to aviation, shipping, RTTY, radiotelegraph and amateur radio.

In half of March 1945, Obersturbanführer trained the Polish Sonderverband (the special formation) to use the radio and the radiotelegraph.

One of the earliest applications of radiotelegraph operation, long predating broadcast radio, were marine radio stations installed aboard ships at sea.

The classes were conducted by the Room 2426 crew, and the radiotelegraph operators became known as the "On-The-Roof Gang".

This new edition was completed in 1930 and was adopted by the International Radiotelegraph Conference held in Madrid in 1932.

"Radiotelephone" is often used to describe the usage of radio spectrum where it is important to distinguish the type of emission from, for example, radiotelegraph or video signals.

A Marconi radiotelegraph station had been operational at Delhi, India at the time the Indian capital had moved there from Calcutta in 1911.

The U.S. Congress enacted legislation soon after, requiring U.S. ships to use Morse code radiotelegraph equipment for distress calls.