Live telephone interview this Wed morning with Angus Houston, retired chief of the Australian Airforce, who is in charge of the new joint agency MH 370 coordination centre, including search organisations, governments, industry, family and media.
He said the ATC transcript appears as a normal pilot exchange.
He also stated that they will continue to search and to search with vigour.
There is no time frame, but if nothing is found on the surface they will have to make other plans.
He reiterated that search was based on satellite datum and unambiguously kept referring to the plane in the Ocean.
When asked, he said was not aware that a British submarine was to join the search and commented that it was currently 5am his local time.
ABC shortly after the interview stated that an Malaysian minister announced the subs involvement via twitter in the early hours.