Kiwi sailor Natalia Kosinska is staking a claim for Olympic selection at the world RS:X boardsailing championships in Israel.

Kosinska has finished fourth and third in her two races on day two to jump from 16th to sixth overall.

Racing is under postponement on day two of the world 470 championships in Argentina, where Paul Snow-Hansen and Daniel Willcox are leading the men's fleet after two wins on the opening day.