Prop
I just don't think they see the need to give infinite detail as to where and why the ships are, just that "searching for debris or preparing for future ops" is enough and go into more detail re locating the pings.
Re "USNS Cesar Chavez is to relieve HMAS Success as SAR supply/support vessel."
They must be chewing through stores / fuel to require replen at sea already
unless another reason ?