This is the first major international regatta back in the boat for the New Zealand's Olympic silver medallists and they will be aiming to continue their excellent form.
With another four days to be sailed in a new and experimental format, the challenge is on for the Kiwis to stay at the top.
"[We need] to be consistent. It's a long regatta, so just keep getting good results on the board and keep doing what we're doing," said skipper Marcus Hansen.
On the women's skiff course, the 49erFX fleet got in three races, with Alex Maloney and Tauranga's Molly Meech coming away with 2, 10, 3 and now lying fifth overall on equal points to the Brazilian crew in fourth.
Meanwhile, Natalia Kosinska holds second place at the 2013 RS:X Women's European Championships, running consecutively in Brest, France. Kosinska holds second overall in the open women's fleet, where 42 board sailors are racing.