The DUKW is a famous WWII amphibious truck. Today a large fleet (flotilla?) of them lives on in Boston, painted in gaudy colors and providing tours both on land and water. Tuesday I had occasion to be along the Charles River while servicing the MOS letterbox. It was a beautiful morning, and at one point I could count six of them visible in the water at once. The sixth one may be hard to see at this screen size, but it’s there, fourth from the left in the far distance.