The first-day leader in the highly-competitive ClubSwan 36 fleet was also the one that had travelled the furthest to be in Valencia – Mamao came all the way from Brazil.
A 1-2-3 scoreline saw her finish two points ahead of the hard-charging Black Seal, with several Irish crew onboard. Richard Thompson's crew took the last two race victories of the day.
Thompson's crew includes National Yacht Club bowman Will Byrne, North Sails sailmaker Nigel Young from Royal Cork and Kinsale ex-pat Jeremy Elliott, in the role of Watch Captain.
Mamao's owner Haakon Lorentzen said: "It was very good, and we won the day today. We are having fun and it is great to be back international sailing. We are here to do as well as we can.
"The team is from a yacht club in Rio de Janeiro, and we have been sailing together for many years, and they are great sailors."
Results here