Challenged with trying to find a compromise I set to work first creating a mock-up with foam and plywood in an existing 226 scrap boat. I developed a concept of a retractable lean-back that would disappear under the passenger seat bottom. To comply with with ABYC seat impact tests the lean-back would need to lock into position and withstand the weight of a person sitting on top of it in the upright position. I created a gas assisted hinge mechanism that locked upright using an off the shelf Sea-doo latch. Once the seat bottom is opened a lever is pressed and the lean-back retracts into position.
A small extension deploys from the same seat bottom opening to fill the gap between the dash pad and the front of the passenger seat bottom. A folding dash pad allows you to lean on the passenger dash facing aft or access the stereo head concealed behind.