For close piloting inshore, it is important to steer down a straight track from one navigation mark to the next. Merely ‘aiming’ the boat will not be enough if there is any cross-set. As soon as you round a mark, line up the following one with some convenient object behind it. This will establish a natural transit. So long as you keep the objects in line, you must be on the straightest track. Any object will do as back marker for a casual transit, even a distant cloud if there isn’t much wind and the leg is a short one.