Numerous Coast Guard and NYPD vessels were enforcing a full closure of the East River as world leaders gathered Tuesday at the UN, including local response boats, some of Bayonne’s black-hulled cutters, and the 154-foot fast response cutter William Chadwick down from Boston. Things were quieter on the North River, but the Sandy Hook patrol boat Bonito did make a trip up as far as the GW Bridge before turning around to anchor overnight in Gravesend Bay. The 89-foot Bonito is the only white-hulled cutter based in New York Harbor. As of Thursday morning, Bonito is closer to home, currently in Sandy Hook Bay.