This documentation assumes that you have recorded your survey data in -a waterproof paper notebook. If instead you are using a PDA to record the survey readings + a waterproof paper notebook. If instead you are doing paperless surveying (e.g with a phone) to record the survey readings digitally for your first cave, don't. Use the paper process first, then when you are familiar -the overall process, look at the PDA additional notes. +the overall process, look at the digital surveying additional notes.