Hi Ron
Nothing to do with me I know, but its possible that the leaders have full time jobs and help with Sea Cadets as volunteers in the evenings and weekends. Its unlikely they'll have set up any facilities to contribute online or anything very sophisticated, but you never know.
What I'm pretty sure about, is that they will have worked really hard to get the BBC there (they don't turn up very often and certainly don't give it air time unless they're failrly impressed with the story) and will have a genuine "Powerboat Fund" underway.
Like a lot of voluntary groups, things aren't always quite as well organised as those paying professional fundraisers, but I hope they reply to you and offer some reassurance.