Chatham Harbour (former name States Bay, Spanish: Puerto de San Joseph, Puerto de San José) is the large bay indenting the central part of Weddell Island in the Falkland Islands.[1] It is entered east of Beacon Point and west of Loop Head. The 3 km wide bay extends 5 km in southeast direction, this part of the feature forming an anchorage named Bald Road, and north of Clay Point turning for 10 km in southwest direction. Chatham Harbour is centred at 51°50′16″S60°57′32″W / 51.83778°S 60.95889°W / -51.83778; -60.95889.
A post 1770 large scale, southeast-up map of Chatham Harbour (Puerto de San Joseph in the title); the illustration shows a north view of the harbour entrance marked by Bald Island (island “A”), with Mount Weddell prominent in the background
B. Stonehouse (ed.). Encyclopedia of Antarctica and the Southern Oceans. Chichester, West Sussex: John Wiley & Sons, 2002. 404 pp. ISBN978-0-471-98665-2
P.P. King and R. Fitzroy. The South America Pilot.Part II. From the Rio de la Plata to the Bay of Panama, including Magellan Strait, the Falkland, and Galapagos Islands. Fifth Edition. London: Printed for the Hydrographic Office, Admiralty, 1860. pp. 116–118