Great Britain's Tom Daley and Peter Waterfield made hard work of qualifying for the 10m platform synchronised final at London's Olympic Aquatic Centre.
Competing together for the first time since July, the pair were 10th after five dives at the World Cup event.
However, a strong final routine earned a score of 402.15 and saw the British pair finish sixth in the standings, with the top 12 progressing.
"It was nerve-wracking going into the competition," Daley told BBC Sport.
"The crowd really carried us through, but the main thing is that we did our job and made the final."
Waterfield added: "We've had a few ups and downs with injuries, so just to get it in there and get that out of our system was good.
"It didn't go exactly to plan but I'm sure it will later on [in Thursday's final]."
China's Yuan Cao and Yanquan Zhang were the leading pair, 58.05 points ahead of Daley and Waterfield.
"We didn't dive anywhere near our best and we still scored over 400, which is pretty good considering how we dived," Daley added.
In the afternoon session, GB divers Hannah Starling and Rebecca Gallantree have the chance to secure two places in the women's 3m springboard competition at the London Olympics.
They need to finish in the top 18 to reach the semi-finals, otherwise they will return on Sunday for the "dive-off", where any nations who have not qualified places will contest the remaining Olympic positions which have yet to be allocated.