DORSET windsurfer Emma Wilson stormed into second position overall in the women's RS:X at Tokyo 2020.
Christchurch's Wilson, 22, was fourth after day one but took a commanding victory in race four before adding fourth and second-place finishes.
Olympic debutant Wilson is now tied on a net 14 points with French windsurfer Charline Picon – who leads by virtue of two race wins.
Wilson's colleague Tom Squires moved into seventh overall in the men's RS:X, securing a second and fourth either side of an 11th-place result.
However, other Dorset Olympians experienced a trickier time with Elliot Hanson dropping from fifth to 10th overall in the Laser.
Hanson was hampered in midfleet amid tricky conditions, finishing with a 12th and 17th.
Ali Young, meanwhile, sits 15th after securing ninth and 20th place in the Laser Radial to remain within reach of the top 10.
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Wilson said: "It was a really good day, really happy. It was a lot more fun and a bit more like what we are used to back home but I have prepared for everything.
“The start was really important. I had some good starts and that really helped me and I just kept going fast.
“It’s my first Olympics and I am doing really well. I’m happy.
"We last raced in April and then I went back home to train in Weymouth with my friend, the Danish girl (Laerke Buhl-Hansen), and we are doing pretty well.
"We have a bit of a laugh and a joke before the races and it’s really nice.
“It was pretty shifty the wind from the land so that was always going to be tricky. I had good starts and I just had to try and do what I do best and trust myself.”
Hanson, 27, said: “I’m disappointed with my performance today as I had every opportunity to get some good results and feel I let some points slip.
"It was a really tricky race course with unstable winds and I played it a little too conservative at times when my rivals backed themselves.
“I’m still in the hunt and with three races tomorrow. I’m looking forward to leaving it all out there in what promises to be a very physically demanding day.”
Squires, 27, added: "It was really good fun today. Broke into the regatta yesterday a bit nervous and then to come through today I feel I am racing well, more relaxed, got a lot of energy from watching Emma’s racing and how well she did.
"I didn’t want to have the worst day so tried to do as well as I could.
“The wind was crazy. First race was my jam. I love it when it’s windier and then a bit of postponement just sitting there watching the wind die which wasn’t best for my motivation.
"I just tried to stay calm to see what the breeze was and try to sail fast in the right direction. Simple.
“There’s a massive range of guys size wise. There’s a huge weight range, like 16-17kgs, and depending on the conditions it depends whose game it is.
"Especially when the wind is onshore and it’s a speed race in the lighter stuff the lighter guys do well.
"When it’s a speed race in the breeze it’s obviously the bigger guys, but when it’s that offshore shifty stuff it’s anybody’s.
“It’s a shame about my 11th but after a pretty shoddy start I did the best I could.
"My super strength is kicking up the dagger board in the breeze so I was basically sailing twice the distance of the lighter guys trying to catch them up and hoping for a bit of a shift.
"An 11th was alright after a pretty rubbish start.”
Young, 34, said: “Yeah, pretty crushed, pretty disappointed at the moment. Made some errors in the last race and haemorrhaged quite a few boats.
“We had pretty big pressure differences, like 20-30 degrees of shift, but there were gains, opportunities for gains and losses all around the track.
“We are presented with a different set of conditions for tomorrow, so I kind of need to get settled into what they are.”
All four athletes train at the Weymouth & Portland Sailing Academy, with many based on Portland full-time.
The windsurfers enjoy a rest day tomorrow, while the Laser and Radial classes are joined on the water by Finn, 49er and 49erFX competitors.
Stronger winds are forecast to move in to Enoshima in the coming days as tropical storm Nepartak continues to affect race conditions.
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