Local Apparent Lunchtime is one variable of celestial navigation that is usually possible to estimate with a great deal of accuracy. When you are not allowed to handle the oars, or raise a sail, and your craft is only an inflatable rubber life raft, your mind travels naturally toward something good to eat. At sea, after two weeks and some heavy weather, it’s a crisp salad with plenty of ripe tomatoes you’ll want. But on the river, it may be only a long drink of cool water, and a ham sandwich. Why a ham sandwich? Because given the choice between a ham sandwich and Eternal Bliss, the correct choice is a ham sandwich, since nothing is better than a ham sandwich!