Antarctic Convergence
From Openwaterpedia

12-16 ice swimmers will attempt the IISA Ice KM Swim in the Antarctica Off The Beaten Track Expedition in November 2018
The Antarctic Convergence is a curve continuously encircling Antarctica, varying in latitude seasonally, where cold, northward-flowing Antarctic waters meet the relatively warmer waters of the subantarctic.
Open Water Swimming
It is a site of the Antarctica Off The Beaten Track Expedition in November 2018.