The most accurate answer is St Adjutor. Notwithstanding this,
there are a number of other saints who have been deigned to
patronise activities akin to yachting. For example:- * St Erasmus
of Formiae is widely regarded as the patron saint sailors (and also
the that of pyrotechnicians, steeplejacks, chimney sweeps and
anyone who works at great heights). * * Brendan the Navigator (the
patron saint of mariners, seafarers, sailors and those traveling by
sea), and * * Peter the Apostle (whose wideranging patronage
extends over sailors, popes, fishermen, fishmongers, bakers,
harvesters, butchers, glass makers, carpenters, shoemakers,
clockmakers, blacksmiths, potters, masons, bridge builders and
cloth makers). Apparently, the seafaring of the Bretons regard St
Maturinus as their patron Saint.