Sailors spend a lot of time in awkward positions and frequently on their knees for long period of time. One of the most useful items we have is a gardener’s kneeling pad. Designed for the gardener who spends time weeding and planting they are also work for the sailor working on the diesel, cleaning the sole, or digging through lockers. They can also double as a cockpit cushion. We have couple onboard.
Available online at Amazon or most home and garden centers.