My dive log
I've attached a copy of my "printed" (I print the pages) dive log. I have a similar one for the "even" numbered pages. The only difference is the offsets, so that when printed back-to-back on the same sheet of paper, there is room to punch holes without punching out the log contents. I've modified this - can't recall where I got it originally - maybe someone on here - but I'm still not happy with it.
I do many altitude dives, so I wanted a place to record that info. I also do a lot of NITROX dives, so I wanted that info also. I thought I'd be using tables a lot so I inserted places for pressure group and equivalent depths for NITROX (green highlights) or Altitude dives. I don't use those anymore, since I killed myself by the second day diving. I mostly use my computer for NDL-type stuff.
I do find it handy to record weights and configurations. I go from 2mm shorties in the Caribbean to several layers of underwear and a dry suit. I am also changing configuration between single and independent doubles. It gets really hard to remember the different weights with all the different configurations unless I record it.
I also like to record who I dove with. It's fun to go back and helps jog the memory about who I've dove with since I don't have a dedicated buddy.
I don't require or even ask them to sign, but I don't mind signing anyone elses. I've never been asked to show my log book to anyone for dives or training, but do know that some are asked. I didn't have to show it for Divemaster, but then I have done over 125 dives with that specific instructor.
That said, I also download my computer(s) and log everything in Mares software. I use this as an optional method. My first is the log book, which I fill out contemporaneously, since I have so many different configurations and my short term memory isn't what it used to be. If I waited until I got home from a trip and downloaded 30-50 dives, I'd have a hard time remembering the site names, much less details about each specific site.
I also have an "abbreviated" log in Excel. It has only certain things I'm asked about - number of dives, location, date, depth, bottom time, temperature, etc. I can group dives by depths (40-60 ft, 60-100 ft, over 100 ft) for dive ops that want to know how many of what types of dive you have. It's a quick way for me to look something up.
Again, none of the actual logs has (although information contained within them has) ever been asked for. I believe that you log is for you. Record what you find interesting or terrible about your dives for yourself. In most cases, you'll have many more dives than the minimum required and you'll likely not be asked for it, other than maybe a cursory review.
View attachment Ricks Dive Log Nitrox- oddPagesA.pdf