Homes need pictures hanging from the walls, but sailboats lean over frequently! How do you keep pictures and paintings from falling off the walls or always looking crooked? The answer is simple, poster putty.
I use a nail and hook to hang the picture or painting like any regular piece of art, but then I place a 1cm (1/2 inch) sized piece of poster putty on each lower corner. I hang the picture by the nail and center it so it looks straight, then firmly press it to the bulkhead. The poster putty will glue the picture to the wall, but allow intentional removal from the wall without leaving any marks.
All of the artwork we hang on board Wisdom is done this way and we have sailed many miles heeled over without a single piece of art swinging free or falling off a wall.