I am always a fan of old skills getting a nod in this new age. Something as archaic as Morse code you think would hold very little appeal. This article breaks down a little bit about the history of Morse code and how it came to be. It then gives some serious reasoning for why it could be useful in a survival situation. This is an impressive look at an old skill
What you will find most useful is the link in the article. The link takes you directly to a Morse code training program. It may seem like a silly thing to spend your time on but its an option that before was not available to you. At least spend some time reading the article and then take a few minutes to play around with the trainer. Its actually pretty fun. You never know when that little bit of training could save your life.