Indonesian official : ` ` Our early conjecture is that the plane is in the bottom of the sea '' Ships , planes and helicopters search for the commercial jet . The Malaysia Airlines plane , a Boeing 777-200ER , lost contact with air traffic control over the South China Sea between Malaysia and Vietnam . Indonesian official says visibility in the search area seems to be good . Airline briefs passengers ' family members at Indonesia airport .
Indonesian official : ` ` Our early conjecture is that the plane is in the bottom of the sea '' Ships , planes and helicopters search for the commercial jet . Indonesian official says visibility in the search area seems to be good . Airline briefs passengers ' family members at Indonesia airport .