Would get in about 7 fathoms (sometime a little shallower, but not much) and anchor there overnight (although the nets set out overnight, most of the time a bit deeper). It's not too bad when the the seas are not too bad, but it's always bumpier when on, then merely looking downwards on the waves, from the high shoreline.
There's a little bit of protection from largest waves on the South side of the rock, and the reef that runs from shore out to it.
To the Southwest, just outside the 100 fathom curve there's a natural oil seep. When it's flat calm, at times a sheen can be visible on the surface. In a different fishery,using larger boats, when we used to drag fish trawls through there (designed to get over hard bottom) it would stir things up, and you could smell the crude oil.
My bad. Sorry.