The Charlottetown Airport now has a full body scanner, although the security machine is not yet operating.

Mathieu Larocque, speaking for the Canadian Air Transport Security Authority, said the scanner shows X-ray-style images of people without their clothes.

Larocque said only passengers selected to go through a secondary screening would have to give a full body scan.

"The selection process for secondary screening is done randomly. We have to have, by regulation, a certain percentage of passengers who go through secondary screening," Larocque said.

"It may be for cause if, for example, there are some alarms with the passenger or the belongings of the passenger, then that passenger may be selected to go through secondary search and at that point he or she will have the option of the physical search or the full body scan."

Larocque said screening officers in another area would look at the images from the full body scanners. There would be no identifying information with the image.

The physical search is the same kind of pat down that some passengers go through now.

Larocque said the scanners are already operating in Canada's larger airports. The Charlottetown machine is scheduled to start operating by the end of March.