Location

St. Margarets Bay (44°30'N., 63°58'W.) is an extensive deep bay entered between Southwest Island (44°30'N., 64°00'W.) and Middle Point, about 2.5 miles E. Anchorage may be taken in several convenient anchorages as well as inHead Harbour.

Southwest Island, 26.5m high, lies about 0.4 mile E of White Point, the proper W entrance point of the bay. Charley Rock, with a depth of 3.4m, lies about 0.5 mile NE of the S extremity of Southwest Island.

Horseshoe Ledge, which dries 0.6m and is generally marked by breaking seas, lies in the approach to St. Margarets Bay, about 2 miles SSE of White Point. A bank, with depths of less than 18.3m, extends about 0.4 mile NW and 0.5 mile SE from the center of the ledge. A lighted whistle buoy is moored about 0.6 mile SE of the ledge.

The tidal rise at St. Margarets Bay is 1.9m at MHWS and 1.7m at MHWN.

The tidal currents attain a maximum rate of 1 knot in the entrance to St. Margarets Bay. The flood current sets N and the ebb S, but when close inshore the currents follow the trend of the coast.