Well done. Your dad would have been proud of you. My naval service was this:
I was 15 yrs old, just short of my 16th birthday. I went to the Royal Navy Recruitment Office on Deansgate in Manchester in the days when there were recruitment offices all over the country for the three services. I spoke with the senior officer, filled all the forms in and he told me to get my dad to sign his agreement, as I would only have been a boy sailor, parental approval required. I felt really proud to have joined and couldn't wait to tell my dad, as he was a RN veteran of WW2. I was shocked when he said there was no way I was joining the Navy. He ripped the forms up and threw them in the bin. I couldn't believe it. I thought he would have been proud that I had joined, but no way Jose. No reason given. He just wouldn't let me do it. So that was the end of my naval service!