Split fins: why not DIR?

[jasondbaker]

I often wonder if new scuba technologies are designed to actually improve our diving or lighten our wallet.

I've spent a couple pool sessions playing with split fins. My impression is that split fins are definitely easier to kick. You have to modify the flutter kick a bit to minimize effort and maximize speed. The first time I used split fins I thought they were very ineffective because I was trying to use a standard flutter kick. They are good fins for older divers.

I use a frog kick most of the time now to conserve energy and increase visibility. My quattros are more effective for this diving style.