noun - Naturally Ocean is the non-wetsuit category for solo swimmers and relays at the Cold Half 15 km extreme winter marathon swim in Hong Kong Island. The category follows the rules of solo and relay swimming in the English Channel. There is a separate wetsuit category that is called Wetsuited and Buoyant.
The channel swimmer was going to swim under English Channel rules in the Naturally Ocean category at the Cold Half.
Term coined by Doug Woodring circa 2013.