NEW : Search to continue `` until there 's absolutely no chance '' of locating survivors . NEW : People aboard chopper should be wearing survival suits , locator beacons . 18 survivor in hospital , One man found dead , One still missing . One aboard were oil workers ; copter ditched into waters off Halifax .
NEW : Search to continue `` until there 's absolutely no chance '' of locating survivors . NEW : People aboard chopper should be wearing survival suits , locator beacons . One survivor in hospital , one man found dead , 16 still missing . 18 aboard were oil workers ; copter ditched into waters off Newfoundland .