There is nothing to find at the posted co-ordinates, this is a puzzle cache so you will have to work out the final location. This cache is designed to be a gentle introduction to some of the codes and ciphers you might find in puzzle caches, don't worry each section will help you solve the next one! See the hint for a couple of suggested websites to help with the decoding, and feel free to message me if you get stuck.
Puzzle caches often use letters to represent the numbers in a cache's actual co-ordinates, then solving the puzzle gives you the numbers you need. For this geocache the cache can be found at N55 AB.CDE W003 FG.HJK and there is a checker at the bottom for your answers.
A common code to use is Morse Code you can recognise it by using dots and dashes for letters (these can be sounds or lights too), below we use slashes to separate words
.- / .. ... / ..... / ... --- -- . - .. -- . ... / .--. ..- --.. --.. .-.. . ... / .-- .. .-.. .-.. / ..- ... . / -... .-. .- .. .-.. .-.. . .-.-.-
⠃⠀⠊⠎⠀⠼⠙
⠃⠗⠁⠊⠇⠇⠑⠀⠊⠎⠀⠃⠁⠎⠑⠙⠀⠕⠝⠀⠼⠋⠀⠙⠕⠞⠎⠀⠁⠗⠗⠁⠝⠛⠑⠙⠀⠊⠝⠀⠼⠃⠀⠉⠕⠇⠥⠍⠝⠎⠲⠀⠀⠝⠑⠭⠞⠀⠺⠑⠀⠥⠎⠑⠀⠗⠕⠞⠼⠁⠼⠉
P vf SBHE. Guvf pvcure vf hfrq ba gur Trbpnpuvat jrofvgr. Arkg gel zhygvgnc cubar pbqr.
3 0 444 7777 0 7777 444 99. 8 44 444 7777 0 222 666 3 33 0 44 2 7777 0 555 666 8 7777 0 666 333 0 222 666 66 7777 33 222 88 8 444 888 33 0 3 444 4 444 8 7777 0 0 8 44 33 0 66 33 99 8 0 666 66 33 0 444 7777 0 44 33 99 2 44 88 33.
That cipher uses 6 colours for letters, and black and white for numbers, so you might see Roman numerals used like in the alternative above.
You should have the numbers for the Northings now on to the Westings, first we use Semaphore
Semaphore can also be hidden in clock hands, but always uses 2 lines at multiples of 45 degree angles. Next look for Dancing Men Cipher
First seen in the Sherlock Holmes tales this one is quite easy to spot. You might recognise the next one, it is Pigpen.
The next one uses a rare Pokemon (201)- Unown - there are decoders but have a go just reading it.
The final cipher is a very common code where a = 1, b = 2... z = 26, sometimes called A1Z26 cipher.
11 9 19 26 5 18 15 . 20 8 5 3 1 3 8 5 9 19 1 3 12 9 16 12 15 3 11 2 15 24 8 9 4 4 5 14 21 14 4 5 18 1 8 15 12 12 15 23 5 4 15 21 20 12 15 7
(images from https://www.dcode.fr/ and https://www.geocachingtoolbox.com/)
If you enjoyed this cache there is another that guides you through some of the different types of puzzles you might see - GC9KN2J - #0044 Park Life – Liberton Gardens