In a stretch of the Wash, there is a grid-like arrangement of buoys in the sea. Isn't it strange how these things work out? 
A flock of seagulls were flying past and chose to rest for a while on the buoys in a random fashion before they continued their migration to wherever it is gulls migrate to.
See the grid below. Your task is to work out where the gulls are sitting, given the following rules:
- Each buoy has at most one gull sitting on it, or none at all.
- The arrows are there to give you clues as to where the gulls are positioned. Each arrow in the diagram is pointing to at least one gull, and each gull has at least one arrow pointing to it. (not necessarily in adjacent squares, though!!) -e.g. the rightmost column has an arrow pointing downwards in the third square down. Any one or more of the four buoys below that, in the direction of the arrow, could have a seagull on it, and so on.
- Any buoy with an arrow over it in the diagram does not have a gull on it.
- The numbers at the end of each row/column give the number of gulls sitting on the buoys in that row/column.
Once you've determined where all the gulls are, use picture B below. For each square you've allocated a gull to, find the corresponding square in picture B to get a digit for the co-ords. I'll leave you to work out which order the digits are in (and for that matter, how many gulls there are in the first place!), as that should be obvious once you have all of the digits you need.
The cache is one of our unique brand of unique containers. No spoilers please, keep the surprise for the next cacher.
The cache is a few minutes walk from the nearest parking spot. Please park considerately, safely and legally.
I'm afraid it's not suitable for wheelchair users.
Take care at final location with geokids and geodoggies.
Please bring your own pen.
"The buoys watch the gulls while the gulls watch the buoys who watch the gulls go by"