Nomad Willy
Guru
I think one of the main reasons the GB's have the rep of being a wet boat is because the wheelhouse is so very far fwd. What disturbs the water fwd into spray is the hull just below and more importantly the just above the chine. Wide boats (as the GB's are) push the water aside more suddenly ... the angle of entry is rather wide down there.
But of course the theory is that high flare keeps the spray down low away from windshields and and I'm sure it helps. But it's a combination of many things that gets the spray on deck and a lot of weight like tanks fwd, a chain rode, or cabin and people far fwd like a GB get into the act also. Even the hard chine helps produce spray. Also anti-spray rails actually make spray but they do tend to keep the spray down low but spray is light and the wind picks it up and throws it at the wheelhouse. And of course the weight of the whole boat tends to drive the bow deeper into every wave making more spray.
But of course the theory is that high flare keeps the spray down low away from windshields and and I'm sure it helps. But it's a combination of many things that gets the spray on deck and a lot of weight like tanks fwd, a chain rode, or cabin and people far fwd like a GB get into the act also. Even the hard chine helps produce spray. Also anti-spray rails actually make spray but they do tend to keep the spray down low but spray is light and the wind picks it up and throws it at the wheelhouse. And of course the weight of the whole boat tends to drive the bow deeper into every wave making more spray.