Flying through the blue at speeds far faster than you can kick with virtually no effort, a scooter dive might be the most fun you can have underwater. Here are two cool machines that can help you achieve scuba speed thrills — see the July 2012 issue of _Sport Dive_r for four more.

Pegasus Thruster
-Mounted to the diver’s tank, so hands remain free
-Can be rigged in pairs for greater speed and power
-Compact design creates minimal drag and only five pounds negative buoyancy
-Made from anodized aluminum and depth rated to 400 feet and tested to 250 feet
-Run time: 45 min. (approx)
-Speed: 2.3 mph
Bottom Line
The Pegasus’ unique mounting system makes it attractive to image hounds who want their hands free for photo and video equipment.
MSRP: $2695; http://pegasusthruster.com

Hollis H-320
-One-hand operations allows for 7 speed settings and a cruise control
-Hard anodized aluminum body depth rated to 656 feet, weighs 41.4 lbs dry
-Graduated starts better control during initial thrust
-New design uses exterior water temperature to aid motor cooling
Speed: 3.3 mph
Run time: 180 min. at cruise speed; 50 minutes at full speed
Bottom Line: A serious tow-behind for the technical crowd, the H-320 helps divers cover long distances at extreme depths.
MSRP $5999.95; http://hollisgear.com

NOTE: Speed and run times will vary with changes in current, water temperature, diver profile and other factors.