The relief near the edge of the bulkhead should taper to zero, as should the
tabbing.

Ron White wrote:

Some very good methods have been sugested which made some good reading.
However, assuming you are using 3/4" ply, these 1/8" reliefs will remove
about 1/3rd of the thickness and could(will) creat a stress point where the
1/2" thich relieved section butts to the full 3/4" section of the bulkhead.
If this is a sizeable boat, and the bulkheads are tied into members that
will introduce sort of a parrellogram like stress ( cabin floors, decks,
ect) the working of the stress aforementioned stress point could , over
time, delaminate the plys? Anyway, it's just a thought to consider. It would
look slick but possibly at a cost. I doubt the such a delamination would
have seroius structural consequences, but it might not be pretty.
Delamination or not, certainly it would create a good flex point to crack
your faired out smooth bulkheads to have cosmetic cracks. ( sorry
spellchecker isn't working, got to fix that!)

--
Ron White
Boat building web address is
www.concentric.net/~knotreel