Update: 1230BST (1130UTC) Tuesday (Day 4)

Four teams are still in the air - but how much ballast do they have left?

There are four teams left flying (GBR3, GER1, USA2 and GER2) and they are scattered between Italy, the Adriatic Sea and Croatia. In order to beat the distance of the Swiss team SWI2 they must land south of that team. Anywhere north would give them a lesser distance.

The teams are flying quite high (around 10,000) but not going particularly quickly. With forecasts of unstable weather (and perhaps thunderstorms) ahead, and with an every decreasing load of sand and water as ballast, can they continue to fly throughout tonight and into tomorrow, or will we see them all landing as the sun sets tonight?