When race stewards and officials need to send a message to Formula 1 drivers on track, they can call on teams to relay the information over the radio, or can throw up a flag around the track to instantly alert drivers. Marshals at F1 circuits can wave nine different flags, and some are used a lot more than others.
At the start of every race, the green flag is waved to indicate that the track is clear and racing can start, while the chequered flag is waved to signal the end of a grand prix. F1 fans the world over will be familiar with these two flags, while the other seven flags available to marshals can be waved at any point during a race to either warn drivers about something, or give racers a specific instruction.
