Our first Geocache, sort of adopted from eclimber who placed the original in 2008.
Though this isn’t a station, it’s still a common sight found beside or in this case over a railway line.
The Harefield Bridge is constructed of RBE - Brick and is of the Overline Type, it crosses the line running between London Bridge and Horsham.
The posted coordinates are for the starting point. To get the final coordinates of the cache location you will need to find the bridge identification plate that corresponds to A B C.
This is near a busy road so take care when collecting the required information.
With the information you need to do the following –
N51º (B-C)*3 . (C) (B-A) (A)2
W000º (C)(A+C) . ((B/A)-1) (C) (B-3)
Container is slightly bigger than a film canister and contains a log and pencil. Not enough room for any swaps or TBs.
You can check your answers for this puzzle on GeoChecker.com.