I fixed a paddle break on a similar paddle by doing the following.
Clear away any splinters that get in the way of reassembling the break.
Epoxy the paddle back together making sure you do not add a bend, fixture with clamps or straps if required.
Mill a slot down the center of the broken area at a right angle to the blade face.
Cut a tendon to exactly match the slot out of a strong wood.
Epoxy into place.
Sand and refinish.
This is similar to another reply but from the inside rather than the outside of the break.
If all else fails, you can always wrap it with a couple of layers of fiberglass cloth and smooth it out.
Your hands do not use the center of the paddle anyways.
Good luck.
Bruce

I am sitting here looking at my two piece sawyer arrowhead paddle that
: started life as a one piece sawyer arrowhead paddle. I never intended it
: to be a two piece paddle but as a result of a poorly executed paddle float
: self rescue practice - SNAP!! (glad I decided to practice with my old
: extra paddle) The Shaft broke in two about an inch off the mid point.
: Jagged angular break that covers about 1.5 inches from solid shaft to
: splintered end. No cracking of the shaft beyond the "splinter
: zone" is obvious.

: I would like to attempt a repair if that is possible. The blades of the
: paddle are still in fine shape and I need a back up paddle. I am not sure
: the best method for doing so. Seems obvious that I have to cut away the
: splintered ends of the shaft where it broke. Then what are my options? Cut
: them evenly and add a ferrel in the middle? I think this may shorten the
: paddle by several inches. Cut them at an angle and scarf them back
: together? Make a new shaft and graft the blades to it? Also, this is an
: oval shaft which I think may complicate any scarfing job.

: All advice appreciated.

: Sheepish in Seattle