Ortac is a small uninhabited islet about 5 kilometres (3.1 miles) west of the coast of Alderney near to the islet of Burhou. It measures roughly 50 by 70 metres (164.0 by 229.7 feet), and rises 24 metres (78.7 feet) above the sea level.[1]
A.H. Ewen surmised that the rock's name meant "large rock at the edge" from the Norman language or (edge) + etac (stack). Alexander Deschamps said that the French formerly knew it as "the Eagle's Nest".