
 HISTORY
  LNM13/01-- MASSACHUSETTS-BOSTON HARBOR-WINTHROP CHANNEL-HAZARD TO NAVIGATION; A 25-FOOT SUNKEN VESSEL HAS BEEN REPORTED AT (PA) 42-21-56N, 70-58-30W IN WINTHROP CHANNEL.  THE SUNKEN VESSEL'S POSITION IS UNMARKED.  MARINERS TRANSITTING THE C