Notes:
Ants Vaino was born in Vändra, Pärnumaa county, in southern Estonia (then part of Soviet Union) in 1940. After a successful karting career, competing in the 125 cm³ class in the USSR Championship, in the late 1960s he graduated to Formula 4 cars.

Powered by a IZH Jupiter 350 cm³ motorcycle engine, the Formula 4 single-seater category was created as a linkage between go-kart and car racing, allowing young drivers to step into bigger classes.

At the wheel of his Estonia 15M, in 1970 Ants Vaino won races at Bikernieki near Riga, Latvia, and at his home tracks of Pirita-Kose-Kloostrimetsa and Mäo near Viljandi, Estonia. The following year he was among the favorites to win the USSR Formula 4 title. Vaino achieved outright wins in the season's opening at Bikernieki on 15 April, then at Mäo on 16 May 1971, also setting the fastest lap of the race.

Two weeks later, the Borovaya circuit located North-East of Minsk, near the village of Kopišča, Belarus, hosted the sixth round of the 1971 USSR Formula 4 Championship. Ants Vaino was one of the 35 drivers that started the 17-lap event. During the race he was involved in an accident which proved to be fatal. Vaino was hit by a wheel and succumbed to his injuries on 15 June 1971. He was 31.

Vaino's accident happened near the Moskovskiy turn, almost at the same spot, in the same turn in which Lithuanian driver Rimantas Kesminas was killed in 1979.

The 4.03-kilometer somewhat triangular public roads course of Borovaya which was inaugurated in 1966, included a segment of the Zaslaŭsky highway. Actually it was an extension of the previous 2.85-kilometer variant also known as Maloe Minskoe Koltso ("Small Minsk Ring") that, on its turn, had been established in 1962, using a part of the 44.1-kilometer long original Bolshoe Minskoe Koltso ("Greater Minsk Ring"), the first road track used in USSR since 1955.

• Website ESBL, page http://www.esbl.ee/biograafia/Ants_Vaino_1/?tul=1& .
• Website AUTOSPORT → Forums → The Nostalgia Forum, thread "Speed's Ultimate Price: The Toll", page 19, posting by "Alexey Rogachev", message http://forums.autosport.com/topic/9705-speeds-ultimate-price-the-toll/page-19#entry1389238 .
• Website AUTOSPORT → Forums → The Nostalgia Forum, thread "Lives on (and beside of) four wheels", page 1, posting by "ReWind", message http://forums.autosport.com/topic/140653-lives-on-and-beside-of-four-wheels/#entry4774367 .
• Website Autosport in USSR, by Alexey Rogachev, page hhttp://ussr-autosport.ru/tracks/borovaya.html .
• Website Motor Racing Circuits, by Daniel King, page http://www.the-fastlane.co.uk/racingcircuits/Belarus/Minsk.html .
• Website Puru's Motorsportseite - Motorsport in Osteuropa 1971, page http://www.puru.de/ddrclassic7.html#rus4 .
• Website Facebook - AUTO MOTO SPORT IN USSR, page https://www.facebook.com/groups/autosport.ussr/permalink/2322343214555496/ .
• E-mail by Alexey Rogachev, dated 05 July 2004.
• E-mail by Alexey Rogachev dated 18 October 2004.
• E-mail by Andrei Sidorov, dated 01 August 2019.