Sea Sled madness. It’s in my brain.

What is the length, breadth and depth of the bulwark, as this is a volume calculation.

 

If the cockpit is self-bailing you will probably need more area in the scuppers. But it is not a question of opinions, there are rules that define exactly the necessary surface.
Most, if not all, motorboats that have cockpits like yours or larger solve the problem with an automatic bilge pump, which discharges into the sea when the bilge level reaches a certain height. In many cases that pump is mandatory.
There is no need to complicate your life with "opinions", do what everyone else does.

 

@TANSL The only reason I stuck my nose in is because I had concerns about the issue with my catamaran as well, but had no guidance. Now, just having dejavu..

But not sure if DC is at 0.5 sqft..looks light.

 

@fallguy, I'm afraid I don't quite understand your colloquial expressions but, in any case, I haven't intended on this occasion to comment on anything you might have said in previous posts. I simply wanted to tell DC that, as is the case with most motor boats with cockpits, drainage holes to the sea are not required or necessary. Yes, they must evacuate to the ship's bilge.

 

The opening in the floor that leads to the drainage... Chase, I guess you might call it, is 11 by 24 inches. The chase itself is 4" by 11", same dimensions from one side to another. In terms of available flow rate, the recommended bilge pump for my boat is 1200-2000 gallons per hour. My ports work out to 54000 gallons per hour. If in practice this turns out to be low, I'll add some, in accordance with @Ad Hoc 's sketch.

 

Analyze photographs of pleasure boats and check how many of them carry those portholes on their sides.

 

Well, none actually. The 20' bowrider I was in last week drained into a sump at the transom with a bilge pump.

 

To be fair, the long running tit for tat spat here is missing the obvious concern.

You indicated a half ton of bricks may occassion that spot, so AH is merely making sure any extra ton of water exits fast and you don't go down head first..

If you only had 300 pounds of bikini clad gals up front; it wouldn't be as large a concern.

 

That is a very important concern. It's 25" from the deck surface to the bottom of the keel in the cockpit. Level draft is 8". What trim loaded up? As the man said: "that depends".

 

Exactly.
It is nothing about meeting minimum compliance of rules inter alia, but common sense seamanship!

 

I feel that unless I manage to load up half a ton of bikini clad girls, my life will be incomplete

 

Well, I tried to add some levity, but a half ton could be 3 or 10... and 3 ain't levity

 

In my mind, there are 10.

 

Sadly...that's where shall remain... in my "mind" too

 

I've decided that since I am now old, the half ton can be over several trips.