The Trio is a dumb hopper barge, that is to say a
hopper barge that does not have its own
propulsion. To the best of our knowledge it was
discovered by Ivor Endicott-Davies about 8 years
ago. One of the more interesting aspects of the
dive is the remains of a ferro yacht hull that rests in
the hold. The Trio rests in about 48 metres of water off Mona Vale Hospital.