I think you are right. A cockpit shower would be easier, cheaper, and more convenient to use. Thanks, BillBill I honestly think the benefits to be derived from the project do not warrant the cost and trouble of the installation. Allow me to suggest the installation of a shower in the cockpit. It is simple and you already have a built in drain on it. I hate inside showers on a small boat as you do not have enough room to move around and when you are done then you have to dry the head and the sole after the curtain finishes dripping. Having a shower in the cockpit is more practical as it is there when you come up after a swim and you have all the room in the world to trash your elbows around. Fortunately our cold temperatures are mild so showering in the cockpit can almost be done year round. For those real cold days there are always marina showers and sponge baths. I doubt that you may have the room for a sump box and pump and you will have do some modifications to the sole in the head area to prevent water from running out into other parts of the cabin. You may also not have the head room to install a track for a shower curtain. I'd seen a guy one time that had an inflatable toddler pool to use as a water collector and a sprayer tank to supply the water. It was awkward but apparently it worked well for the use of a couple of times a year. Figure out your needs and take it from there but do consider a cockpit shower.