NEW YORK — Zac Posen has boats on his mind this season. Inspired by the movement of sails, he filled his collection with triangular cutouts, nautical prints, sailcloth and, of course, lots of red, white and navy. Posen also followed up on his fall lineup with constructed suits and plenty of his signature sculpted dresses. As for Behnaz Sarafpour, she’s giving her customers plenty of reason to party — with festive dresses and suits that can go from a holiday office celebration to a New Year’s Eve bash. There were touches of lace and ribbons, and a charming take on the tuxedo. Key pieces included a yellow lace tiered frock, stiff little jackets and a sweet dot-embroidered dress.