First off I have to say thank you ... I've spent a great deal of time on ScubaBoard in the past 8-1/2 years, and thought I had read it all.
none have ever asked to actually see my C-card. Nor have I ever been had a requestion ... on a boat, dive shop, or resort ... to see my dive log. Why would they? A dive log is an easy thing to fake ... and since it's purely an optional device, a great many divers don't even keep one.
... Bob (Grateful Diver)
Bob,
I think TheEngineer has been blocked from further participation in this thread. For obvious reasons.
In so. Cal. the Truth boat, Lois Anne and Spectre all require to see your c-card. I was on the live aboard Caribbean Explorer II in May and at the beginning of the trip they took your c-card, any advanced cards and your DAN card for the week. Like you, I have never had to show a dive log but then I've not been on tech dives that have prerequisites.
Don