These pre-dive instructions (sticking to their buddy, following the DM, max bottom time, using the line to ascend and descend, informing the DM if they decide to ascend, etc) could all be put on a laminated card and given to read before the oral briefing if the same plan is used daily. It would be a win-win. Safer and good for return business. That's the kind of thing people post in their reviews on Trip Advisor. I rent boats and we have a FWC card on each boat. I have posted their description of it below. They have really helped. Imagine trying to decribe a manatee footprint or explain an idle zone.
Laminated with a hole in the corner so it can be easily hung and kept on board any vessel, the waterway card features simple tips to protect manatees and contain multiple color photos depicting how to spot manatees in the water and how to obey posted speed zones, because a picture really can be worth a thousand words when trying to explain these important issues to the public. Information on the card is provided in English, French, Spanish, and German, so it is suited for Floridas many visitors