“The collaboration between Nortek and the entire PUMA team has resulted in an tool that provides unique information to the sailing crew. They can now measure leeway, a first in sailing, and use it to measure ocean currents much more precisely than ever before,” said Atle Lohrmann, CTO of Nortek. “This is the biggest advancement in sailing instrumentation since the invention of the GPS,” said Hopkins, who runs performance testing for PUMA and worked with Nortek on the project. “Nortek adapted their new DVL technology to our sailing performance needs, to measure very high speeds along the boat's track and very low speeds across it. Leeway is the sideways skidding angle a boat makes as it sails forward.