The GB Rowing Team men's coxed pair and eight bookended the morning's session of racing at the World Championships with heat wins.
Cox Phelan Hill and stroke Will Satch brought the men's eight crew home in the concluding race ahead of the challenge from the Dutch and Russians in the quicker of the two eights' heats. Germany won the opposing race.
Double World Champion Pete Reed, the three-seat today, said: "We knew it was going to be a bard heat and the field didn't disappoint. We are quietly pleased and now need to get on and prepare for the final. There is more to come".
Mat Tarrant, Nathaniel Reily O'Donnell and cox Henry Fieldman dominated the first race of the day.
Between the two GB performances the temperature soared into the thirties on France's Lake Aiguebelette. Both crews now move direct into the finals.
The open men's squad rounded off a good morning when John Collins and Jonny Walton raced to second place and a quarter-final slot in the men's double.
Katherine Grainger and Vicky Thornley, in the equivalent women's boat, will race a repechage tomorrow for a place in those quarters on Thursday. They were third to European silver medalists Lithuania and Australia in their heat.
"Today proved just how competitive our event is here. Now we have a race every other day and we will take every one as it comes. We always knew that it would be tough", said Grainger.
The GB women's eight were also third in a very fast heat won by the Olympic and World Champions, the USA, with the Dutch in second.. Jess Eddie explained: "We are still one of the fastest crews here and we are ready to go for that repechage".
Earlier, the light men's four were second to double 2015 world cup winners New Zealand with only one crew qualifying for the semi-finals. With a new line-up since the Lucerne world cup last month, the quartet were relatively pleased with the pressure they applied. 2012 Olympic silver medallist Peter Chambers said: "We knew it would be tough to win that one today and we are happy where we came. It was a realistic position for our first regatta".
On a very positive day for the lightweights, the pair of Joel Cassells and Sam Scrimgeour smashed their heat to qualify for the semis and the lightweight women's quad of Brianna Stubbs, Emily Craig, Ruth Walczak and Ellie Piggott were in commanding form to book at place in Friday's finals when they won their heat in style.
Frances Houghton, Melanie Wilson, Jess Leyden and Tina Stiller will race a women's quad repechage after taking fourth place in a race won by Germany. The same applies for the light men's quad who are all World Championships rookies in their event and who were third today.
This afternoon's session will see the start of the para-rowing programme here. GB has crews in the two arms-shoulders single sculls, the mixed double scull and the mixed coxed four.