Read PART Saf-C 407 RAFTING RULES
http://www.gencourt.state.nh.us/rule.../saf-c400.html
But lots of good info here, anchoring and most things you need to know. But I find it helps to discuss things (even if it stirs up controversy) as it helps to cement it in your mind and you may have misunderstood something at first reading it.