WIRELESS TELEGRAPHY CALLSIGNS OF RN WARSHIPS IN 1919 - I.E., THOSE WHO FOUGHT AND SURVIVED THE FIRST WORLD WAR.

Mentioning those ship's which were fitted with Wireless Telegraphy Equipment.

The hieroglyphics are relatively easy to decipher.  Take for example the APOLLO.  She is a twin screw light cruiser with a callsign of GQHC - look at the first jpeg.

Notice the limited spread of letters i,e,. from GQ onwards.

Notice the original and historically important HMS  DREADNOUGHT with its callsign of GRFH