Great Britain qualified three boats for finals, with four more progressing in the Rio 2016 regatta as racing resumed at the Lagoa Stadium.
Sunday's slate of races was a write off as high winds put paid to any racing, meaning Monday's session was extended to make back some of the time.
The day started well for Team GB, with the men's quadruple sculls placing second to Germany in the repechage to progress to the medals final on Wednesday.
“Repechages in their nature for an Olympic final create a lot of pressure, but we’ve tried not to focus on that and more on seizing the opportunity," said Sam Townsend
“I think that showed out there. We tried to dominate. We were a lot more bullish in that middle 1000m, we just kept going."
The following races provided more for the large British contingent at the side of the lake to cheer about, as both eights won their heats to progress to the final.
The women's crew came from behind to beat New Zealand and Canada in their heat, while the men dominated from start to finish to cross the line nearly two seconds ahead of the Netherlands.
“It was a good start. It’s good to get the first race out of the way. For a few of the guys it’s our first Olympics, so it’s nice to be officially an Olympian now," said Matt Gotrel. “If you want to learn anything about where you’re at you’ve got to go for it 100 per cent, so we attacked it and looked to get our noses ahead. We’ve got a few things to work on and a bit more to come in the final.” To take gold in the women's eight, Team GB will have to beat the formidable USA crew, which is unbeaten in the Olympic Games and World Championships since 2006. But Karen Bennett in the seven seat is confident of breaking that streak. "We have to just stick to our plan and do what we always do," she said. "We just need to believe and we’ll come through. It’s definitely achievable and we all believe that we can do it, and that’s what you really need in a race like this. What better place to beat them than the Olympics to really make a statement." Elsewhere, reigning Olympic champions Helen Glover and Heather Stanning made light work of the women's pair heats, pipping Denmark to the line to move through to the semi-finals. The men's coxless four also sailed through their heat, winning by four seconds from Greece to ease into the next round. Richard Chambers and Will Fletcher will also contest a semi-final, finishing second in heat four of the lightweight double sculls to progress. And double scullers Jonathan Walton and John Collins finished first in their repechage to get through to the semi-final. However Katherine Copeland and Charlotte Taylor will need to come through the repechage to continue their Olympic run in the women's lightweight pair, having finished fifth in their heat.