Centre Cockpit Drainage

[Allan Jennings]

Having nearly finished my boat ( 53 ft) I realise that if my centre cock pit is swamped there is no where for the water to go. OK for the foot well, I have two 2" dia dains but looking at the overall cock pit that dosen't seem nearly eanough. Does anyone know how to calculate how much water goes through a 2 " hole under gravity. What is the maximum time you should be flooded for? I feel an idiot as I designed the cock pit so that the seat backs kept the water out in most weather but if I get really pooped then the water is stuck and only the duck boards in the entrance will keep the central pilot house dry, which won't be for very long!!