Points were predictably close through the leaders at this early stage in the six day regatta, and the New Zealanders can be grateful they're not one of a number of crews suffering boat damage after coming in contact with a rock - or the bottom - off Helsinki.
Fellow Northlander Marcus Hansen and his 49er partner Josh Porebski have also made a solid start to their campaign.
The Kiwi young guns were in 13th place at the end of the opening day, racing home with a fourth, 12th, and eighth place finishes.
In the 49erFX fleet of 51, another Northlander, Alexandra Maloney, and her partner Molly Meech are in 17th after four races.
"Tough first day for us, as we forced ourselves to play catch up in all four races," said Maloney and Meech.
"We are happy there are plenty more races over the next five days to improve on today's performance."
New Zealand boats:
49er (83 boats): 6th: Peter Burling and Blair Tuke 17 points (1, 12, 4); 13th: Marcus Hansen and Josh Porebski 24 points (4, 11, 8); 39th: Logan Dunning-Beck and Jack Simpson 40 points (15, 16, 9); 58th: Ben Goodwin and Sam Bullock 53 points (15, 13, 25).
49erFX (51 boats): 17th: Alexandra Maloney and Molly Meech 23 points (8, 11, 6, 9); 27th: Erica Dawson and Ellie Copeland 33 points (11, 9, 13, 23).