When you are flying a River Rover hovercraft you need to be able to do lots of things at once. Steer the craft, talk to people on the radio, move fuel from one tank to another, wipe the windscreen and change a display setting on the instruments. All in addition to adjusting the throttle, negotiating a change in wind or river flow direction, and watching out for birds or branches. All of that first group you can do single handed – literally with a single hand – via the control yoke. It’s one of those deceptively important parts of the hovercraft. If the piloting gets challenging, and it does from time to time, you need to be able to act quickly without searching for switches, just using the device already to hand.