These sailors representing Rarotonga, Aitutaki, Pukapuka and Penrhyn are competing in the under-16 championship which is held in gold and silver and green fleet.
Yesterday a total of 16 races took place – eight each in the gold and silver and green categories.
Sailing Cook Islands treasurer Rory Quirke said the championship would run until tomorrow, with more exciting races expected in the remaining two days.
He said the competition was running in conjunction with the National Development Sporting Structures course which started on Monday.
The course, facilitated by Chris Goldacre, the Australian Sailing Discover sailing instructor, is a way of continuing the development of sailing in the northern group.
Penrhyn, Rakahanga, Manihiki and Pukapuka are the first islands to receive Olympic Solidarity technical support.
The second phase will see the same course rolled out for the Aitutaki and Rarotonga Sailing Clubs in October/November, with the third phase including a detailed look at the overall structure of sailing in the Cook Islands.