Ainslie, 35, claimed Finn gold at London 2012 to bring his tally of Olympic medals to five – one silver and four golds – but announced he would not be continuing on to the Rio Games.
But despite stepping down Ainslie is convinced Great Britain can have success in the Finn class for years to come with 25-year-old Giles Scott waiting in the wings.
Scott ran Ainslie close for the sole Finn spot at London 2012 and also won the World Championship title in 2011.
And Ainslie is convinced Scott is a ready-made replacement to take over from him, adamant he could have won at London 2012 if he had competed.
"He is ready to fill my boots," Ainslie said. "He would have been a red-hot favourite for these Games if he had been able to race.
"Already he has been world champion so he undoubtedly has the talent to go on and be successful at the Olympic Games, and I am confident he can do that.
"I don’t really need to give him advice. It is nothing technical, that is for sure. He is as good as anyone.
"If ever there is any advice it is on the lifestyle side of being an Olympic athlete and the pressures of being a favourite and those sorts of issues rather than anything technical."