Pacific Ocean
The Pacific Ocean was an Earth ocean that bordered North America, South America, Asia and Australia. The island of Salutua was located in the Pacific, as was the port of Honolulu. (PROSE: The Eye of the Giant)
The Pacific Ocean contained ocean trenches. The high pressure in these trenches meant that fish had to be specially adapted in order to survive. The Torchwood Hub had an aquarium containing deep-sea fish from the Pacific Ocean. (PROSE: Slow Decay)
In 1770, the First Doctor, Susan Foreman, Ian Chesterton and Barbara Wright met Captain James Cook aboard the Endeavour while it was sailing the Pacific Ocean. Shortly afterwards, the TARDIS was lost at sea but was eventually recovered. (AUDIO: The Transit of Venus)
The Russian city of Vladivostok was located on the Pacific coast. When the Russians built a railway connecting Vladivostok with Europe prior to the 1930s, trade imports to Manchuria in China and to Japan declined. (PROSE: The Shadow of Weng-Chiang)
In World War II, after the Japanese attacked Pearl Harbor on 7 December 1941, (PROSE: Only Connect) the American forces were faced with the challenge of crossing the Pacific to reach Japan. Numerous islands occupied by thousands of Japanese soldiers willing to die for their Emperor stood in their path. Both American and Japanese fighter pilots encountered Light-beings in the war in the Pacific. (PROSE: Endgame)
In the 1970s, the Third Doctor briefly materialised on the bottom of the Pacific Ocean while attempting to go to Bombay. (PROSE: Island of Death)
By 2050, an alliance known as the Pacific Union was active. It was presumably based around the Pacific Ocean. (TV: Lost Library of Ukko)
