The price of £1,042pp includes full board, equipment, guide and luggage transfers, but not flights.
On-board equipment regulates the signals by routing them via satellite to the correct point on the ground.
The risk of an electrical fire is one reason why pilots are able to switch off on-board equipment, including that responsible for communications.
The big carriers also analyze information pulled from on-board equipment that resembles the flight data recorder, to look for safety gaps.
"Even if all on-board equipment is switched off, it is impossible to fly through in a silent mode," Serik Mukhtybayev, deputy head of the Kazakh Civil Aviation Committee, said in a statement.
Qualcomm said that the on-board equipment, which weighs about 50 pounds, could be used on almost any plane, but that it would seek to sell the technology mainly to large air carriers in the United States.
Action Outdoors (020-3328 5443, action-outdoors.co.uk) has a week at Port d'Albret further north, staying in beach huts from 29 July for £518pp including full-board, equipment and surf lessons, for 18-40-year-olds.
Instead of exotic destinations, the new, post-credit crunch thing is the £479 per person per week package from Crystal, which includes not only flights, transfers, half-board or self-catered accommodation and a local rep service but also a lift pass and ski or board equipment.
The on-board equipment, which the company calls Autograph, notes the position of the car 10 times each hour, and radios that back to the company at specified intervals, so Progressive has a good idea how long the car was driven and where.
Central Asian countries Kazakhstan and Kyrgyzstan, at the northern end of the search arc, said no unidentified planes had entered their air space on March 8: "Even if all on-board equipment is switched off, it is impossible to fly through in a silent mode," the Kazakh Civil Aviation Committee said in a statement sent to Reuters.
