When I was about 14ish I took another course to get my advance diving license. I getting an advance diving license it allows you to go about ten feet deeper than what you could in the first rank license as well as it allows you to go night diving and take specialty course as well. To get the license you basically had to do the same thing as the first time around but taking different lessons and preforming different tasks. It was a little bit more difficult to do but I passed it.
image cited:
www.bio.utexas.edu