The men's and women's fleets were seeded into fleets based on past performance, and will be re-seeded for Tuesday based on their overall leaderboard position.
Australia's Mat Belcher and Will Ryan opened their Championship pursuit in first overall on the leaderboard, from a 1,1,2 scoreline. 2012 Olympic Gold medallist Belcher has won the 470 World Championships with Malcolm Page three-times, with back to back wins in 2010, 2011 and 2012. The Belcher and Page partnership claimed an unmatched run of wins from December 2011 to Page's retirement after the Olympics, a performance which the new Belcher and Ryan combination has continued. Last month in Italy, the pair also won their first 470 Open European Championships title.
The only team to beat the Australian's in the yellow fleet were Greece's Panagotis Mantis/Pavlos Kagialis who took out the race three victory.
"There are a lot of good sailors in this fleet," said Kagialis. "And the Australians are currently the best, but they can be beaten."
In second overall are Pierre Leboucher and Nicolas Le Berre who on Saturday won the 50 Year Cup long distance race, with New Zealand's Paul Snow-Hansen and Daniel Willcox in third. Willcox comes from a family of 470 sailors, as his father Hamish is a three-time 470 World Champion, and raced the Legends' Trophy on Sunday 4 August.
Making their nation's debut performance at a 470 World Championships are Matias Monthino and Sergey Paixao from Angola.
470 Men - Top 5 Overall
1. Mat Belcher and Will Ryan (AUS) - 2 pts
2. Pierre Leboucher and Nicolas Le Berre (FRA) - 7 pts
3. Paul Snow-Hansen and Daniel Willcox (NZL) - 9 pts
4. Panagiotis Mantis and Pavlos Kagialis (GRE) - 10 pts
5. Nicholas Rogers and Elliot Willis (GBR) - 10 pts
Olympic Champions Jo Aleh and Polly Powrie from New Zealand control the 470 Women leaderboard with a 2,1,1 scoreline in the blue fleet. France's Camille Lecointre and Mathilde Geron raced in the yellow fleet and sit just three points behind. The two teams will only come up against each other in the finals stage on Wednesday, and last met at the 470 European Championships in July. There the French pair won the European Championship title, with the New Zealanders finishing second in the Open European Championship.
Aleh commented, "In typical regatta style we had conditions we hadn't seen for the two weeks we have been here getting ready, complete with thunder storms early on today. It was a great breeze of 12-16 knots, and some rather large waves at times as it is very shallow out there. We started off well with a second in the first race, and then followed that up with two race wins."
China's Olympic pair of Xiaomei Xu and Chunyan Yu end day one in third overall. Early days, but looking promising for an upgrade on their 16th place finish from the 2012 470 Worlds.
Great Britain's Hannah Mills and Saskia Clark are making their first competition appearance since winning their Olympic silver medal last year. The defending 470 World Champions, have taken a 10 month break since Weymouth and with not many hours in the boat preparing for the Worlds and expected to find themselves a little off form. A 3,2,4 scoreline on day one is an excellent start.
Clark commented, "We probably feel a bit gutted that we're going in as defending World Champions and are probably not in any fit state - in terms of hours we've done in the boat - to defend our title. But it is what it is. We've taken the time off because we felt it was the best thing long-term so we'll have to take the short-term hit!"
470 Women - Top 5 Overall
1. Jo Aleh and Polly Powrie (NZL) - 2 pts
2. Camille Lecointre and Mathilde Geron (FRA) - 5 pts
3. Xiaomei Xu and Chunyan Yu (CHN) - 6 pts
4. Hannah Mills and Saskia Clark (GBR) - 9 pts
5. Afrodite Kyranakou and Anneloes van Veen (NED) 11 pts
Two races will be held for all fleets on Tuesday 6 August with a scheduled start time of 1400 hours.
The Championship format splits the 470 Men into three fleets and the Women in two, to race the qualification stage of five races over two days, with one discard. After the qualifying stage, the 470 Men teams will be split into gold, silver and bronze fleets, based on their position on the leaderboard, and carry forward (C/F) their leaderboard position into the finals stage of 7 races over three race days. A second discard will be allowed during the finals stage, but not the C/F score.
Scoring is 0 points for 1st, 2 points for 2nd and so on during the qualification and finals stage. The top 8 in each fleet will then proceed to the medal stage on Saturday 10 August for a single Medal Race with a double points score, where 1st equals 2 points, 2nd equals 4 points and so on.