They do not need to be completely enclosed, but there should be something to hold onto in case of sudden movement or change of direction. Hitting key heading is included in this.
We appear to have some different points of view on here, and that is fine, the world would be a very boring place to live otherwise. We have to realise that sometimes we are never going to change others viewpoints and just move on.
Never hired from Silverline, but this is the first time that I have heard anything remotely negative about them. Everyone who we have spoken to that has been on one of their boats has been extremely complimentary about them.