Menster Ledge  Menster Ledge () is a relatively level benchlike feature which rises to southwest of Mount Olympus in Hughes Basin, Britannia Range, Antarctica. The feature is wide and is smoothly ice covered in the central and northern portions; an abrupt ice and rock cliff forms the south end of the ledge. It was named after Chaplain William Menster (Commander, U.S. Navy) of the flagship in Operation Highjump, 1946–47. The location of the ledge is in proximity to Byrd Glacier, Mount Olympus, and other features that memorialize leaders and ships of Operation Highjump.