King Carlos owned four yachts called Amelia, but it was the last one that he had when he was elected into the RYS.
Yacht Amélia (1896), a yacht bought for the oceanographic campaign of 1896
Yacht Amélia (1897), a 300-ton vessel, obtained for the campaign of 1897
Yacht Amélia (1899), a Scottish-built vessel obtained for the campaign of 1899; bought by American oilman Henry Clay Pierce in 1902 as his personal yacht, Yacona; later acquired by the United States Navy as USS Yacona (SP-617)
Yacht Amélia (1903), also used for oceanographic work; in 1910 took King Manuel II and his family to exile in Gibraltar; yacht was later renamed Cinco de Outubro