GB pull off oar-some medal haul in Lucerne.
Katherine Grainger and Anna Watkins delivered two of the golds with dominant wins in the double and quadruple scull events - the latter in tandem with Beth Rodford and Annabel Vernon.
The lightweight men's four came from behind to pip world champions Denmark and the fourth came from a powerful men's four performance.
"It was a good fight in the double and we wanted to put a really good race together here in the quad, said Watkins.
"The days don't get much better than these."
Performance director David Tanner said: "This is our best World Cup season ever.
"All the world was here in Lucerne so to come away with so many medals has been an exceptional whole team performance.
"I'm very proud of our rowers, coaches, and the back-up team that has helped us produce this level of results."
"This has been very special", said Grainger. The men's pair and lightweight women's double scull hoped to do better than the silvers they won.
But, by contrast, Alan Campbell reversed a disappointing run of form to finish second in the single scull final.
Marcus Bateman and Matt Wells, in the double scull, lost out to their French rivals to take silver.
The still-developing men's quadruple scull were bronze-medallists in a tough field and the two British eights gave a rousing end to the day's racing programme by each taking a bronze medal - the men having to beat the Olympic champions to do so.
"It's like a dream to win so many medals at Lucerne," said men's chief coach Jurgen Grobler.
* Katherine Grainger, left and Anna Watkins