This is part of a short multi cache that's designed to involve a short walk, an occasional bit of head scratching and, most importantly, a bit of fun.
The series is based on the idea of there being a 'Himley Triangle' ... that 'Ships' and 'Planes' enter, only to disappear 'Into The Deep' and never be seen again.
This is the 'Himley Triangle: Planes' cache.
You will need the following information to find the Mystery Bonus:
How many aeroplanes are on the container? (Answer = B)
You will also need to retrieve information from the ‘Himley Triangle: Ships’ and ‘Himley Triangle: Into The Deep’ caches to find the ‘Himley Triangle: Mystery Bonus’.