Maby it means that if you draw a circle (360 decrese), and put egypt in the middle, the numbers will tell you in what degree the enemy is located.
I dont know how this will help, but what ever.
Edit: the pluses and minuses indicate that the enemy is large and takes up more then one degree.
I dont have time, but if you are confused about what i just said, tell me and I\'ll explain later.