In 1974 a discovery was made at Langdon Bay off the coast near Dover. It contained bronze axes of French design and is probably the remainder of the cargo of a sunken ship. At the same time, this find also shows that trade routes across the Channel between England and France existed already in the Bronze Age, or even earlier. In 1992, the so-called Dover boat from the Bronze Age was discovered in six metres depth underwater. This is one of the oldest finds of a seaworthy boat. Using the radiocarbon method of investigation, the year 1550 BC was determined as the year of construction of the boat.