have a leak can't find it

[ventura38]

how to determine if the center pocket is leaking on 1978 20 o day sail boat when it is under the inner liner

 

[Project_Mayhem]

Does this happen when its in the water, out of the water or both?

 

[Clutch Cargo]

Can you explain what the "center pocket" is? Better yet, can you share an image or 5?