USH meaning in Airport Code ?

Ushuaia ( oo-SHWY-ə, Spanish: [uˈswaja]) is the capital of Tierra del Fuego, Antártida e Islas del Atlántico Sur Province, Argentina, and the southernmost city of the country. Ushuaia claims the title of world's southernmost city. Ushuaia is located in a wide bay on the southern coast of Isla Grande de Tierra del Fuego, bounded on the north by the Martial mountain range and on the south by the Beagle Channel. It is the only municipality in the Department of Ushuaia, which has an area of 9,390 km2 (3,625 sq mi). It was founded on October 12, 1884, by Augusto Lasserre and is located on the shores of the Beagle Channel surrounded by the mountain range of the Martial Glacier, in the Bay of Ushuaia. Besides being an administrative center, it is a light industrial port and tourist hub. Ushuaia is located roughly 1,100 kilometres (680 mi) from the coast of Antarctica.