Did you run out of ROV Record of Operation pages? No problem. Either print it out or download it and save it as your own then you can use it as a digital log.
Instead of getting a supervisor signature I just add their email. It's a reference sheet anyway and what better reference than asking from the horse's/supervisor's mouth. Hell, add an email & phone number.
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I know there are going to be some places that might not accept these pages but you can use them as a easy reminder to yourself on the jobs you've performed over the last couple of years. And being on the cloud you can carry them any and everywhere.