Poleson Marine diving vessel

What I want to tell the OP is that if he wants to put the bow in the bow, well put it, he will know why and where. Like any other type of boat, the cabin should be where it is most convenient, depending on how you want to use the boat. It must be taken into account, for example, that in an environment as hot as the one in the Red Sea, the closed cabin will be small, placing, yes, an awning or canvas on the rest of the deck. There are many factors to take into account that only the OP knows about. If he doesn't tell us everything, we can only speculate and give him advice of doubtful use.
On the other hand, it seems that the OP has already found advice from a builder, which will lead him to design a ship that is closer to what the builder normally makes than what he originally thought. That is to say, he will have to adapt his needs to the builder's boat to which only small changes will be introduced without, I think, lowering the total cost.

 

Exactly. That is what the design spiral is. What the owner wishes and what the marine design formula(s) tells us. Changes maybe slight or downright impossible/impractical.

 

@Squidly-Diddly makes a good point re the vertical accelerations and their effect on the crew in the wheelhouse perched right up forward on the bow.

@RSD would it be feasible instead to have the wheelhouse at the aft end of the boat, and have the working deck forward, perhaps covered by a large bimini type of canopy, or would this not be practical?

 

Unfortunately in our working area where the reefs are numerous and very complex and uncharted we really need the wheelhouse up the front so as the captain has the best view of the reefs and we don't add to the tally of shipwrecks to be investigated.

 

Good point - and also your other comment re how the motions will discourage the skippers from driving too fast!

 

I assume you won't go full speed ahead when dodging reefs. You could have a double control stations. One aft in the cabin where it is safer and more comfortable at high speeds. When in uncharted shallow waters, you would go forward. However, with forward scanning sonars, it is possible to get a good ideas of what is ahead.