Being a big boat man myself, bearing in mind that not all areas operate the same set up as the solent, if you pass astern-brilliant, if you pass ahead that's ok but what we really don't enjoy is when someone disappear under the bow. The min vis required is at 500m, so nearer than that and we don"t know whether you've altered down the side, made it across or broken down and about to get run over. RIBs tend not to be a problem as they've the speed to get out of the way, but yachties can find themselves struggling. Also bear in mind the real lack of manoeuvrability on a big boat. Other than that, if there's not much water, there's not much we can do about it, so we don't worry too much- the onus is on anything smaller to stay out of the way. If it doesn't then you have unfortunate events like the Hanne Knusten (or sister?) And WAFI incident in Cowes. ..