David Raimbault clinched a momentous victory in the third race of the sailing programme.
It is the first time that an Islander has made it into the top spot which moved Raimbault up to sixth overall as he placed fourth and sixth in the day's other two races. Team-mate William Holden placed 19th and was twice 21st.
Sailing team manager David Carter said: 'We've had some fairly good results before but never an individual win so this is a brilliant result'
Jersey added to their medal haul yesterday when Chloe Turmel won gold in the 800m to add to her gold in the 1500, and swimmers Rhianna Donaldson won silver in the 400m freestyle and Sian Cumming, a bronse in the 100m butterfly.
• See Saturday's JEP for full report and more results.