For those of us who do not know the area, could you please show us where this boat went aground and what his route was and (if different) should have been. Would he have been sailing between Lasell I and Mouse I or trying to get between Lasell and Goose Rock?
I'm 95% sure, Archangel fetched up on the lone rock about 1/2nm NE of East Goose Rocks on this screen shot of my ipad.
They stuck the connected ledge just to the SE of the "*" ="obstruction that covers". This ledge and rock were between 2 and 5' below(not long after HW) the surface when they fetched up.
A friend that came upon Archangel not long after the grounding, thought it was a motorboat, anchored(the rig was gone, the boat flat and upright).
After 8 more feet of tide ebbed away, I suspect it was then she layed over and the photos of the article were taken. To her port is in fact the rock * about 3 feet above LW(which is where it should be at LW, I've passed dozens of times).
I stuck a bearing line which is the general safe passage between the rock they hit and lasell Island, the yellow land mass to the North. This is a busy passage, many boats travel through, and it's nearly a straight line between Camden Harbor and Pulpit Harbor.
There's nearly a quarter mile of safe water but Tim is right, it's best to favor the Lasell Island side.