My Two Favourite Pirates

This is a straight forward one stop multi that brings you to a fun area in Ottawa. If you are here in the summer I hope you enjoy the pirates.
The cache is not at the posted coordinates but you will find a sign here.
Let a = the number of holes you find in the sign post.
Now from the end of the pier make a projection of (a X 107) / 10 meters and a X 6.5 Degrees True and go find the cache.
Enjoy the Walk.