Buying a replacement pencil for your Dive slate?
Not just any old pencil will do!
Most ordinary pencils are made from wood with a graphite core, the wood swells in the water and eventually the pencil breaks up.... making it useless for the task
What you will need is a wood-free pencil with a nice strong graphite core
And from one pencil you will get two dive slate pencils.....
You will need a fine tooth wood saw, pencil sharpener and a steady hand, measure half way down the pencil and saw in half. Sharpen the new slate pencil and there you have your spare pencil.