the line is there but electronically so it doesn't have to be a visible line. the line which i refer to crosses the water between two electronic sensors and as such the boat has to cross that Line between the two points to generate a sound which indicates the boat has crossed a line to win. so, in essence the two electronic points are joined across the water by an infrared line which when broken, sets off a sound.
Team GB are still the cricket gold medallists / Olympic champions. Cricket was an event in 1900, when we won, and not since! Woo!
The answer was.. ..swimming. It was a question at a pub quiz, somebody text me to see if I knew the answer.
It doesnt have a finishing line though It has finishing touch pads - oh and if someone argues it is a line you cross it when you dive in and also when you get out