I saw a style of boat a couple of days ago on Moreton bay that I have never seen before.Looked around 38Ft.
At first I thought it was a cat but closer up it actually looked more like a mono with another smaller hull
attached by a bridge deck
was only on the larger hull
and continued partway across the deck
was fitted to the smaller hull and appeared to have fixed booms front and back and looked as though it would pivot 360 degrees.
Unfortunately no pictures.
Any idea what it was?