chinese ship. a specially equipped british ship has now arrived at the spot where the two pulse signals were picked up. and on board the hms echo, high-tech detect has occurred. northeast of there, the australian ship ocean shield is continuing its investigations, trying to figure out the source of a curious, quote, acoustic event. and today another question is emerging. did the plane try to avoid indonesian airspace? a senior malaysian government source has come out with an explosive allegation that flight 370 apparently steered a suspicious course to avoid indonesian radar. for the very latest on the search, i want to go to perth where the news conference is about to take place. and our senior international correspondent matthew chance is there. matthew, any idea what we're going to hear in this press briefing? >> yeah, well, it's going to be an update on the various missions that are under way, the search episodes that are under way out in the indian ocean