has now arrive at the spot where the two pulse signals were picked up. on board the hms echo high detection gear. just north, just north-northeast of there, i should say, 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. and for the latest on the search, i want to go to perth, where the news conference is soon to be taking place, and that senior international correspondent matthew chance. so matthew, do you have any clues as to what this impromptu press briefing may be about? >> not really. i mean, i've spoken to the press office there, and they've said