During my OW class we only dove with RDP and the few of us that had the eRDPml used those (however we were at altitude too - 5000 ft). After getting that I went to Australia to get my AOW and right off the hop I was using a computer and after 2 dives decided to buy one. As far as my log goes I have a fairly involved log that I actually made myself that gives more info and more room for stuff like Altitude Diving (which I will be doing the most) and Nitrox info such as my EAD and dive PPO2 and daily O2 % as a cumulative total. I fill this in religiously after every dive for a number of reasons:
1 - I know when and where I was
2 - I know certain situations (cold water, what wetsuit strength, current etc)
3 - SAC rate and air consumption etc
4 - Easy Altitude calculations (with enough room to work it all out)
5 - MOST IMPORTANT - Calculate bottom time and depth so I know if I can dive again should my computer fail.
The 5th part is the most important and because I multi-level computer dive every time my ending pressure groups are always way off the RDP and eRDPml scales but in fact I'm still being quite conservative. When it comes to the profile portion of the log I'll fill in my max depth and any associated EAD (Nitrox) and/or theoretical depths (altitude) plus my safety stop but pressure groups almost always end up reading "XTL" (eXceeds Table Limit) meaning that if the computer failed one look at the log says "sorry, no more diving today".
Bottom line, forget the profile if you are computer diving, the computer is more accurate but do know how to fill it in in case your computer gives up the ghost.
1 - I know when and where I was
2 - I know certain situations (cold water, what wetsuit strength, current etc)
3 - SAC rate and air consumption etc
4 - Easy Altitude calculations (with enough room to work it all out)
5 - MOST IMPORTANT - Calculate bottom time and depth so I know if I can dive again should my computer fail.
The 5th part is the most important and because I multi-level computer dive every time my ending pressure groups are always way off the RDP and eRDPml scales but in fact I'm still being quite conservative. When it comes to the profile portion of the log I'll fill in my max depth and any associated EAD (Nitrox) and/or theoretical depths (altitude) plus my safety stop but pressure groups almost always end up reading "XTL" (eXceeds Table Limit) meaning that if the computer failed one look at the log says "sorry, no more diving today".
Bottom line, forget the profile if you are computer diving, the computer is more accurate but do know how to fill it in in case your computer gives up the ghost.