Nick Copsey, former Ely sports personality of the year, is studying ship science at the University of Southampton.
Two years ago he began building his own National 12 class dinghy, finishing the boat last summer.
Earlier this month, he displayed his two person, two sail racing dinghy. at a national boating show, the RYA, at Alexander Palace.
His dad Gerald said: “Many visitors were very impressed with the boat and amazed to discover that it was an amateur build.
“Around 8,000 visitors came to see the various designs of dinghy.