But that day apparently has not yet arrived. In Newport last week was John Livingston, formerly of Australia but now living in England, clutching a model of Kurrewa VI and eager to have a go at the Ould Mug. His Kurrewa V was eliminated during trials against the eventual challenger, Sovereign, in '64, but his case of cup fever rages unabated. Tank tests have been under way for three years, and Livingston intends to build a six-meter version for a half-size check as soon as his challenge is accepted. So, having survived wars, depressions and rising costs for more than a century, the cup continues viable, but it may be a long time before an invader finds the right wrench to unbolt it from its table in the New York Yacht Club.