Martinborough freediver Kathryn Nevatt is planning a world record attempt at the Genesis Recreation Centre pool in Masterton in early November.
Nevatt, 33, wants to beat the world record of 160m held by Russian Natalia Molchanova in the discipline of Dynamic without fins, something she achieved unofficially at the national indoor freediving competition held in the Te Rauparaha Arena Aquatic Centre in Porirua last month.
Then Nevatt managed a distance of 163m but, with no international A level judge in attendance and a doping test not carried out, her effort was noted by the sport's international body as a world's best, but not a world record.
Nevatt's Porirua effort saw her hold her breath under water for a remarkable 3 minutes 1 second while completing six-and-a-half lengths of a 25m pool and she is "pretty hopeful" of at least repeating that performance in Masterton.
"I know it all comes down to what happens on the day but it's nice to know I've already proved I can do it, that helps the confidence."