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NOTICES OF SHANGHAI.
The river of Wúsung.
Vessels of light draught may navigate the Yangtsz' kiáng with ease and safety, but it will be necessary for vessels above 18 feet to make the Amherst rocks, (which are 20 feet above the sea, and in lat. 31° 9′3 N., and long. 122' 23′6 E.,) and to have beacons placed for them to sail by. Leaving the Amherst at a quarter ebb, a vessel will carry the flood to Wúsung if there is any wind.
The following courses will insure deep water. From the Amherst rocks S. 72° W., 144 miles, but care must be taken that the vessel really makes good this course, and that the flood tide does not sweep her to the northward of that bearing, which is given to clear the Ariadne rocks. The sea breaks on the Ariadne rocks in strong winds, and the lowest tides. The bearings from these rocks are, Amherst, N. 77° E., 71⁄2 miles; Shau-e-shan, N.; Gutzlaff I. S. 9° W.
After passing the Ariadne, should the northeast break or ripple be seen, it will be the best leading mark, for the deepest water is close to the bank. The course along it will be about N. W. † W.; it bears from Shau-e-shan S. 30° W., and is distant from the Amherest rocks, 16 miles. If it is not seen, having run the first course and dis- tance, a course N. 61° W. will take a vessel in mid-channel to Wúsung; but as the strength and set of the tides will materially affect the ship's course, vessels are recommended to use the ground log, both for course and distance.
Having run 24 miles on the second course, approach the low west- ern land to one mile; at this time a cluinp of trees making like three will be seen; keep this distance from the bank until a remarkable high tree is seen (if it is clear). At the same time will be seen Paoushan point, which is the sharp angle of an embankment; when within a mile of the High Tree point, increase your distance from the shore, and not bring Paoushan point to the northward of W. by N. § N.
The best anchorage off Wösung will be Bush island, N. W. by W., and Wúsung village joss pole, S. 41° W., in 8 fathoms. The leading mark into Wúsung is the joss poles at the village, S. 41° W. But the best leading mark will be for a vessel at anchor in the above position, to place one of her boats for a beacon. When the low point below the embankment shows clear of Paoushan point, close the western or Wusung shore to a cable, where is good anchorage. Proceeding from Wisung to Shanghae, keep the western or left bank on board until you open the second creek on the opposite shore, which will be a mile above the village; then cross over and
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