I use a Oceanic VT3 computer and download to my computer after each trip. I have made the concession of a hardcopy log book and just print out the computer log, punch holes in the sheet and add it to the logbook. Since the software allows me to manually add dives not logged by the computer I have done so. With all the dives accounted for I print out a new summary page after any updates and add it to the front of my logbook. Anyone that needs to know my experience can look at that first page and get enough info to justify my present PADI C card. (AOW)