Part of planning a dive is planning the activity on the dive. In some dives the objective may be to swim to a location and do something there, and swim back. Other dives the objective may be to carry out a task like a search and recovery pattern, focused on the object of the search. Some dives might literally be a race with DPV's, like they have in Florida. But when the purpose of the dive is to enjoy being in the marine environment, the way to see interesting things is to relax, have a buddy looking one way and you the other until something interesting or new is seen, and then watch it. Debbie and I love watching animal behavior, whether breeding, nest building, hunting, eating, cleaning, territorial defense, or anything else. To do that you can't be made to rush to stay with the dive leader and group. We are fortunate to dive our own profiles on nearly every dive. (current professional rating and current DM insurance) Liveaboards offer that kind of freedom as well. However, we all have experienced the day boat DM led dive that has a group swimming along with little or no pauses, and those quite short. It's still fun diving, but it's not the same. One of our favorite dives ever involved moving a total of less than 50 yards on an entire dive, watching a turtle on a wall ripping and eating what I believe was sponge, and watching fish come and grab at the loose floating stuff around the turtle, sometimes being snapped at by the turtle because of getting in its face. Another time on a night dive we sat in one place and spotlighted free swimming fish, and then watched as tarpon swam in and gulped them down. Those kind of dives beat the "tour" dives every time in my book. These kind of dives do not lat 45 minutes- they can last well over an hour on a single 80 tank (ndl's permitting).
DivemasterDennis