Looong way from Elfin Cove to Auke Bay in a dinghy
, particularity with the currents in Southeast. Actually, he probably doesn't need a grid to fit his prop shaft, if it came off the transmission
it sounds like a coupling problem.
One thing you can suggest is have him work up a parts
list and order replacements
via his VHF
through one of air taxi outfits, who will expedite the parts
from one of the marine
supply stores or cannery and fly them out to him wherever he can anchor
. Fix on the boat and keep going. Commercial
fisherman in Alaska do this all the time.