NEW : Thai data indicate belief that the jet turned sharply westward . Sources disagree over whether plane could have slipped past them undetected . Analyst : The blind spots could be determined ` ` easily '' Security risk : Someone could have chosen a route to avoid detection .
NEW : Thai data bolster belief that the jet turned sharply westward . Experts disagree over whether plane could have slipped past radar undetected . Analyst : Radar blind spots could be determined `` easily '' Security consultant : Someone could have planned a route to avoid detection .