1. Write it in pencil (not in pen). The pencil writes even if it rains or if it gets wet; however, the pen, depending on the weather (cold, rain, ..) or place (eg sea), could not write. The ink of the pen with ethanol can be erased. The pen will always write and it will not be erased.
2. Label your logbook with:
Name
Phone number
3. Always place every entry (date, hour and site), just like a journal.
