Three exhibitions inspired by Sag Harbor’s maritime history will be on view at the Sag Harbor Whaling and Historical Museum from Saturday through Sept. 10. A reception Saturday from 6 to 8 p.m. will feature Scott Schwartz, Bay Street Theater’s artistic director, reading the preface Jacques Cousteau wrote for a collector’s edition of “Moby-Dick” that was published in 1975 by Steve Abramson, a Water Mill resident.