Alan Adams wrote:

If you haven't read that up in detail, you should. The issues were

Coaches who weren't qualified for the conditions (coastal water)
Coaches has expressed their concern to management, who didn't want to
know
A group got scattered in an increasing offshore wind and several died

Fortunately for the coaches, they had expressed their concerns in
writing,
which was what enabled them to avoid prosecution. The centre manager
ended
up in jail.

And following the Lyme Bay incident, the Adventure Activities Licensing
Authority (AALA) was set up. Your centre is, I believe, legally bound
to be licensed by them. On their website (http://www.aala.org) they
have plenty of guidelines and advice. This document in particular
http://www.aala.org/pdf/02_06_10_GPinES_Version_Two.pdf
has information relevant to your situation.
If you think your employer is operating dangerously outside the
guidelines then they are the right people to deal with it.