There is a Sailing Directions publication on Antarctica. Get it read it.
"... Commonwealth Bay (67˚01'S., 142˚40'E.), 27 miles wide, lies W of Cape Gray and recedes for about 12 miles. The E side of this bay is obstructed by many islets which lie up to 2 miles
offshore. The Hannam Islands lie about 2 miles
offshore, 7 miles W Cape Gray. Whetter Nunatak, a conspicuous rocky outcrop, juts through the ice cliffs, 3.5 miles S of these islands. The Laseron Islands, a small group, lie on the SE side of the bay. The Mackellar Islands lie in the center of the bay and about 1.5 miles from the
head. This group consists of about 30 rocks and small islands which extend over an area, about 2 miles long and 1 mile wide. The largest island in the group is about 0.5 mile long and is the site of a large penguin rookery. Several
reefs and shoals lie in the vicinity of these islands and they should be approached with care."
Note the words 'ice cliffs'.
Good luck!
PS I would LOVE to go and
winter over - but man you need a piece of
boat to do things there.
b.