  UNKNOWN SOURCE-- THE SUBMERGED WRECK WAS APPLIED BEFORE 1972 TO THE LAKE SURVEY CHART BEFORE NOS TOOK OVER THE CHART AS A SUBMERGED NONDANGEROUS WRECK. ON NOS CHART 14929, 19TH ED. JUNE 16/90, THE WRECK WAS REVISED TO A SUBMERGED DANGEROUS WRECK. (ENTE