Being able to pass the exam is not the same thing as learning and applying the rules.
Take McKoy’s class at SUNY, (Alumni know what I’m talking about) you will know the rules intimately and how to apply them. Not just be able to pass the exam. I agree he is a difficult individual, but his record stands for itself. Every person that has made it past McKoy’s assessments now has a USCG license.
I originally learned from a USCG Commander who was captain on the cutter I served on. He was on the IMO committee when they modernized the rules in the last 70s early 80s. He literally knew every word even the annexes, and we applied them every day steaming around the Georges Banks and Gulf of Maine.
I had a set of flash cards back in 1987 that were military issue, playing card sized that were very good. I purchased a set recently that were more like business card sized that were not nearly as good. In fact there was a mistake on one of the cards. I called the publisher out on it and he agreed to correct it for the next printing.
There are a bunch of pneumonics that are helpful in memorizing things. We even made up a few of our own.