Did this last year while at CN. Spent about 3 to 4 hours doing the independent book work, then did the prerequisite dives. At 121 feet (37 meters) we had to tie knots using a rope and do math problems to ensure our brains could function at that depth. We then had to navigate using a compass and also using natural landmarks. Cost was $265 us$. It was definitely worth doing.
Donít forget to do a night dive, aside from spending time with my wife it was one of the highlights of our trip.
CN Feb. 11 Ė 20, 2011; 3 weeks from today, not that Iím counting!