Shifting Backstay. Backstay that was let go, when tacking, and shifted to the new weather side. Is a seaman's name for a man who has no standing job, but is put to any work that may require doing at the time.
Shifting Boards. Planks and boards erected in a hold to prevent a cargo from shifting. Particularly necessary with bulk grain and similar cargoes. Also used for preventing shift of solid ballast.