If it works it will give us a sizeable table when erected, but as it will hang under a shelf when folded it will take up virtually no living space when not in use.
Dimensions have been absolutely critical due to the space it has to fit, but the clever bit is the folding leg hinges which lock into place when either fully up or fully folded.
Here you see the underside with one leg up and one folded.
The clips along the edge will clip over a rail suspended under a shelf below the gunwales. They will (I fervently hope) support the whole table when folded and the rear edge when erected.
The perceptive reader may ask why the legs are in such odd positions. It's all to do with where we sit and where our legs are. It remains to be seen if we have them right ;-) The top currently looks rather like a rectangular piece of varnished plywood, which is what it is.