TVO....
Back in 1980 when I was first roaming the French canals in my little boat, I came across another Brit in Epernay. He had a splendid ageing wooden craft...and an engine that ran on TVO; unavailable in France. He told me that he carried numerous jerry cans and whenever he needed fuel, he would take a taxi to the nearest airport and fill them with avtur!! The bowser types would ask what it was for...and blench when told it was for his boat!! Probably visualising a Donald Campbell "Bluebird" type vessel.....