Date
Name
Swim Time
7 September 1977
Cynthia Nicholas
19 hours, 55 minutes
4 August 1979
Cynthia Nicholas
19 hours, 12 minutes
28 August 1982
Cynthia Nicholas
18 hours, 55 minutes
18 August 1983
Irene Van der Laan
18 hours, 15 minutes
22 July 1991
Susie Maroney
17 hours, 14 minutes