HISTORY
  Charted rocks awash.  
  T-1304/1872-- Source, originally reef symbols.
  H4688/27--Hydro support for charted rocks  at 47/57.48N, 122/40.50W.
  H8912/66--Items for Future Presurvey Review,   Two rocks charted at 47/57.48N, 122/40.50W.
Sev