NEW : Search to continue `` until there 's absolutely no chance '' of locating survivors . NEW : People aboard chopper should be wearing survival suits , locator beacons . and then they hit the water or landed in the water approximately eight minutes later , '' he said . New : Helicopters are being sent out from the base in case they need help. 18 aboard were oil workers ; copter ditched into waters off Newfoundland .
NEW : Search to continue `` until there 's absolutely no chance '' of locating survivors . NEW : People aboard chopper should be wearing survival suits , locator beacons . New : Helicopters are being sent out from the base in case they need help. 18 aboard were oil workers ; copter ditched into waters off Newfoundland .