Allan Rockwell McCann was in charge of the development of a submarine rescue chamber, which bears his name, "The McCann Submarine Rescue Chamber". Additionally he was assigned as Liaison Officer / Engineer when the submarine was converted for use in the under ice attempt to circumnavigate the Arctic Ice cap and voyage to the North Pole. Modifications to the submarine were extensive, and contained innovations of a telescoping conning tower, an ice drill, an incorporated diving bell and an Air Lock, designed by Simon Lake. The submarine was designated "Nautilus" and leased for one dollar to Lake and Danenhower, Inc., of Bridgeport, Connecticut,
Ice cap climate polar and there are some communities that are situated in a transitional zone between the two climates, but barely qualify as a tundra. Some places like Antarctica had a different climate before having an ice cap climate. Under the Köppen climate classification, the ice cap climate is denoted as "EF". Ice caps are defined as a climate with no months above . Such areas are found around the north and south pole, and on the top of the highest mountains. Since the temperature never exceeds the melting point of ice, any snow or ice that accumulates remains there permanently, over