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Show 3869 Gerdine- R 1890 made in the summer months, i understand? A Yes sir. B Now, if a person having these maps in his possession knew they were made in the summer months, and saw sandbars designed, and knew those were exposed sandbars, if he was coming down the river when there was higher water, wouldn't the designation of these bars give him warning that there was shallow water ahead of him, if the bars were exposed in the low water there would be shallow water over the bars when the river was higher, wouldn't the fact that he saw these on this map give him warning as he came along that there was going to be shallow water or the likelihood of it? I understand the bars shifted and changed, but at least he would be warned that there was the likelihood of shallow water, wouldn't he? A Yes sir. Q Why wouldn't that make a map of some assistance? A The map primarily -- Q I understand it is not for the purpose of navigating. A As a matter of fact, the five- foot contours across the surface of the water is the real warning to navigation. If you get up in the Cataract rapids or the principal stretches where there are rapids, and notice these five- foot contours, now close together they are, and if you knew how to read the map, you will be rather careful going down the declivity of a |