"[...] do they still learn morse as part of their usual training?"
Recently I was given a guided tour of our local Sea Cadets hut. At one end of the assembly hall was a raised symbolic bridge construct with port and starboard light fittings - from where the senior officers gave their announcements etc.
Finally I was shown their pride and joy - the engineering and communications room. Its centrepiece was a cut-away car petrol engine that could be cranked slowly to show the various moving parts.
Where was the comms gear? The morse code key? Ah - they didn't do that any more. However they did still teach semaphore flags - which were essential for some traditional ceremony or competition.