'In 1984 there was a handful of women and now I'm sailing with four girls on my boat, there's four on many of the other boats and it's a great thing because it's really good there's diversity."
Navigator Cahalan has been part of several line honours winning crews, featuring in multiple triumphs on Wild Oats XI.
While Cahalan is the first female to 25, she could be joined by several more in the next few years. "There's a lot of women now coming through in the teens and 20s, so you'll see the floodgates are open," Cahalan said.
However, her imminent milestone is just halfway to the male race record of Tony Cable, who this year will contest it for the 51st time.
Among the women competing this year is 2012 470 Olympic gold and 2016 sliver medallist Jo Aleh, who is using the race on new supermaxi CQS to prepare for a possible place in the 2017-18 Volvo Ocean Race.
- AAP