What would a radiographer do on a ship?
Answer:
I believe your grandfather was a Radio Officer onboard ship. In the old days (early 1900's) there were very few ships with radios or radio officers. When the Titanic sank, there was a massive political response in the US. The results of this was the start of the SOLAS regulations (safety of Life at Sea). One of these regulations required that radios on ships be manned. At the time the Titanic hit the iceberg, the "California" was only 7 miles away, but her radio officer was off duty, and so, unable to hear her distress signals. Another result of that loss was the requirement for distress flares, the shorthand of SOS, the requirement that every vessel have a seat in a lifeboat for every person aboard and many other good rules that exist to this day.
Well, in 1930, radios were used onboard merchant ships to send and receive telegraph messages to and from shore. At that time, a telegraph operator would have been called a telegrapher and a radio telegraph operator a radiographer. So, I submit that your grandfather knew Morse code and was employed to send and receive telegraphs by radio at sea.
think he had something to do with arranging the wireless communications on the ships, making sure they were all tuned far enough apart so as not to interfere with one another. '30s radios were hand-tuned and had some horrible leakage rates, so you'd need someone with some skill to arrange frequencies well.
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