? Series - 4) Which doctor are you? Mystery Cache

This cache is part of the ? Series, a series of caches that make up a ? when viewed on the map.

There is nothing at the listed coordinates you must work the final coordinates out.

This cache is based on the TV series Doctor Who.

To find the final cache, you must research the different Doctors and list the number of years that they were the Doctor for.

You must find the values for:

Matt Smith                        A

David Tennant                    B

Colin Baker                        C

Christopher Eccleston         D

Then substitute in your values into the following:

N 51° D B+D . C D B+A

W 000° B D-D. A+D D B+C

The Cache

The cache is a VERY, VERY small magnetic container with a log book.

It is hidden in plain view.

You can check your answers for this puzzle on GeoChecker.com.