Gemma and Ian both dive with Shearwater dive computers as their main computers to help plan and maintain their dives.  Ian has used the Perdix Ai for a few years and Gemma was supported by Shearwater Research really early on in her diving career and loves her Shearwater Peregrine.  Shearwater dive computers are so clear underwater and at a glance gives you all the information you need even in poor light and when in trhe North Sea when sometimes the visability can go.  For all levels of diver these dive computers with the 2 button menu system is easy to master and use even with 3 or 5mm neoprene gloves at depth.  Check out some of photos beloe of our dive computers from above and below the water.  Go to Shearwater for more information.