have frequently hove to in sf bay (30kt and 4ft seas) with a 90% jib and a double reefed main 30ft vessel with a fin keel uldb
the effect was remarkable
my female crew could use the head with relative ease.
procedure: tack the boat without tending the jib sheet/ 2 trim the main just enough force her head up against the pressure jib making her fall off/ 3 helm left hard alee. accept smiles of grateful crew hard on your rudder though