It’s been a good summer for boating, with a number of long, sunny days promoting leisurely rides homeward after the traditional dinner hour. Those days aren’t gone yet, but sunset is definitely coming earlier and earlier, reducing the return trip time envelope measurably.  Now, boating after dark, especially if the air temperature is warm, is a great experience, but without daylight, it can be a dangerous one as well. For example, in this area, there are a number of large and small rocks that partially submerge, depending on the tide, making them virtually impossible to see in limited light conditions. [...]