I was nine years old at the time; and riveted by every news report.
My father told me that Carlsen remained on board in order to resist, as far as possible, any salvage claim. He told me that in all probability any other shipmaster would have done the same in all the circumstances (i.e, for as long as there remained any possibility that the ship would stay afloat).
He also told me that Dancy got himself aboard the ship not only to assist Carlsen as far as possible in saving the ship (by handling the heavy towing-wire etc) but also in order to advance a salvage claim; thus raising the probability that Dancy's presence on board was not wholly welcome.
I remember that there was huge admiration for everything that Carlsen and Dancy did, but no real surprise.