Re: "are the seamen equipped with oars?"
I passed a morse test for Amateur Radio in the 80s, it was easy enough - only 12wpm.
I still hear morse occasionally because there are enthusiasts keeping it going, it has a longer QRP reach than voice. Repeater ID themselves with morse and so do aviation NDBs.
Receiving morse and getting the letters down is not a problem, the difficulty is understanding the message as it will likely be all abbreviations and codes.