The cache is not at the posted coordinates.
You are looking for a grey rectangular solid measuring 13.5cmx9.8cmx5.9cm. Bring your Vernier calipers to verify these measurements. It has a mass of 1845.1grams. You could bring your beam balance to check this.
Calculate it's specific gravity, accurate to 8 significant digits. Did we pay attention in grade 9 science class?
You score no extra points if you use a calculator, one extra point if you do it with pencil and paper, two extra points if you use a slide rule (what is a slide rule?) and three extra points if you do it in your head. Will this object float in water? Will it float in liquid mercury? Bring a pail of mercury to test this.
Call these 8 digits A,B,C,D,E,F,Gand H.
The actual location (final stage) is N45 D,E.H,D,C W077 zero,F.B,A,A
Please be stealthy as this can be a busy area.
Please write a humerus account of your adventures finding this cache as others have - extra points might be awarded.