Circle Line Sightseeing Cruises:

Location #1: pier 83 (42 Street and Hudson River)
212-563-3200
www.circleline.com
There are 2 or 3 hr narrated cruises around Manhattan

Location #2: Circle Line Statue of Liberty Ferry/Zephr Battery Park, South Ferry
212-269-5755
1 hour narrated Manhattan harbor tours with access to Statue of Liberty and Ellis Island