The given coordinates will take you to a position from where you will be able to obtain the substation plant and equipment number (SPENS No) which is engraved on the gate label.
You will need this six digit number in order to work out the cache coordinates.
Cache co-ords:- N 50 49.X E 000 15.Y
Where X= the voltage applied to the resistor in circuit #1 (volts)
And Y= the voltage applied to the resistor in circuit #2 (volts)
For circuit #1 assume the resistor has a value of 20ohms and the current flowing in it is :-
[2nd digit x 3rd digit x (6th digit - 1st digit)] / 4th digit amps
For circuit #2 assume the resistor has a value of 50ohms and the current flowing in it is :-
[(1st digit x 5th digit x 6th digit) + 6th digit] / (3rd digit x 4th digit) amps
The cache container is made from re-cycled bottle tops and is about the same size as a film pot.It contains log sheet only so please bring your own pen or pencil.