I like the idea in principle. I think the RNLI already has a pretty good safety summary which is well supported with various free resources (booklets, CD ROMS etc) and it would make sense to promote that message for consistency. The following is from their website ...
Sea safety advice
The RNLI believes, and its service return information confirms, that a very large majority of lifeboats services can be attributed to a group of reasons, which can be summarised, as preventative activities.
We hope to bring your attention to these and other pieces of advice through these pages and continually develop new ways of delivering safety advice in an interactive and informative method.
1. Wear a lifejacket
2. Check your engine and fuel
3. Tell others where you are going
4. Carry some means of calling for help
5. Keep an eye on weather and tides
6. Get proper training, and boat within your limits
There are many other pieces of advice related to boating safety that are covered within the CD-ROM of Sea Safety, The Complete Guide, available free from www.rnli.org.uk/seasafety
or 0800 328 0600 (UK) or 1800 789 589 (RoI)