Bell's Signal Multi-Cache

At Stage 1 you will find what is shown below, but different. All you need to do is transpose the letters in the image with the alphanumeric characters at Stage 1. (where a=1, b=2 etc) This will all make sense when you get to GZ. 

Use your GPS or projection app to go [GMF]' at [TXP]° from Stage 1. The final geocache is hidden at that location.