We were taught morse and expected to read @ 5wpm during flying training. Remember once frontline being tested during FOF3 inspection whilst on a Flight - told to hover by bridge whilst mssg flashed at us - neither of us had a clue what it said (I used excuse had to maintain scan therefore missed bits) but when the bod doing the flashing disappeared in a hurry we wondered where he'd gone and so nipped over to the other side of the boat to see if he'd reappear.
You guessed it - mssg read to move to hover on opposite side of boat - we were the only crew to get top marks!!!