My log is more of a journal than a log but it’s always been a good source of info on when I wore ( ) wetsuit with which BP&w this tank and that pony what weight did I wear.
I have 3 wetsuits plus hooded vest, 4 different tank sizes, cold and travel size back plates and wings so sometimes I need to look at the log to refresh my memory.
My paper log got out of hand and now I just keep a digital log