King George V arrives for start of Cowes Week Regatta

The video discusses the historical significance of the yacht Britannia, highlighting its connection to Thomas Lipton. It details a race where Britannia competes against Shamrock, describing the dynamics and performance of the yachts. Ultimately, Britannia emerges victorious, leaving Shamrock behind.

What is the significance of the starting signal in the context of the race?

Describe the action of the mainsail as mentioned in the text.