Proving your whereabouts

WE ARE receiving suggestions about proving that as a continuous cruisers you actually prove that you do move the required distance with *Ian Waters telling us:

With suggestions of boaters maintaining logs to prove to mooring wardens that they are cruising, would a simpler solution be to just get into the habit of taking a digital photo of your boat when in a prominent location such as a lock or tunnel to show that you are cruising and not permanently moored?

Date stamp

Most cameras and phones can of course insert a date stamp which should help in any discussion.

* We have two Ian Waters contributing, this one under the email of bargee.