ter satellite contact was lostР24 March: Based on new calculations, Malaysian PM says "beyond reasonable doubt" that plane crashed in southern Indian Ocean with no survivorsРWhat we knowРThe search for flight MH370Р"I know that until we find the plane, many families cannot start to grieve. I cannot imagine what they must be going through. But I can promise them that we will not give up," he said.РMalaysian authorities e in for heavy criticism over their management of the search, especially from relatives of thРWeather conditions were fair, with visibility of approximately 10km (6 miles), the Joint Agency Coordination Centre () - which is overseeing the search - said.РThe British submarine HMS Tireless is also in the southern Indian Ocean and is due to be joined by Royal Navy ship HMS Echo.