Margaret Duncan swim in 1930
| Swimmer | |
| Name | Duncan, Margaret |
| Gender | F |
| Age | 25 |
| Nationality | South Africa |
| Country | South Africa |
| Swim | |
| Year | 1930 |
| No of Ways, Leg, Direction | 1-way, 1st, F-E |
| Swim Time, Departure, Arrival | 16:17:00, , |
| Ratifying Organisation | CSA |
| Sandettie Weather Data |
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| Sea Temperature (C) | |
| Wind Speed (kn) |
All times are UTC/GMT, adjusted by one hour ahead during the summer to British Summer Time (BST).