BRC is alot of water time, surf negotiation, zodiac boats, beach survey, learning comm gear, land navigation, team movements, PT, swimming, PT more swimming and more PT with classes in between swimming and PT.
Don't know what the drop rates are currently but remember this. The class is made up of type A personality's who have gone thru selection , INDOC and RIP beforing going to BRC, they don't drop for no reason.