HISTORY
  Charted shoal.
  H4711/27--Source for charted shoal of 1 fathom at 47/56.54N, 122/36.78W.
  H8912/66--Items for Future Presurvey Review,   A shoal of 1 fathom at 47/56.54N, 122/36.78W.
Several rocks, piles, and shoal soundings, which were n