Join Date: Aug 2016
Location: Eastern Ontario
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Re: Crazy first time out on my sailboat today
Some thoughts on your plan if I understand it correctly. My 21 foot boat has neither a self draining cockpit nor a self draining sink. The boat has 0 through hulls.
Not having a self draining sink is no big deal. The sink is removable and I just toss the contents over the side when required.
Not having a self draining cockpit is a pain in the neck. It requires frequent bailing in anything but benign conditions. I have both a manual pump and a bleach bottle bailing can, we usually use the bleach bottle. Aside from being a pain in the neck on your boat, having a flooded cockpit would raise the centre of gravity on your boat as the cockpit is raised above the bottom of the hull. So raised centre of gravity plus free surface effect is going to impact your stability.
My thoughts are, no big deal to plug the sink, but potentially problematic and even unsafe to plug your scuppers. Here is a pic of my non self draining cockpit after about 90 minutes of hard rain.