AN AUTOMATIC SHIPBOARD DEPTH PLOTTING SYSTEM

W. J. Tyler

Peer Reviewed

Abstract: This paper Describes the CAE-designed Automatic Shipboard Depth Plotting System (see Fig. 1). The requirements for this system were first laid down by the Canadian Hydrographic Service as a means of labour reduction and accuracy improvement in the surveys carried out by hydrographic vessesls. The present methods of surveying used by teh Service consist of running a survey vessel in a grid over the survey area and recording water depth adn ship's position at regular intervals. From these recordings a preliminary chart is hand plotted, showing the ship's track and the recorded depths. The ship's position is determined by a two range radio frequency ranging sytem, having slave beacons at two known points. Continuous monitoring of the beacons by a transmitter/receiver on board ship yields the two ranges R1 and R2 to teh stations. This position is then recorded on the chart together with the water depth as determined from the ship's echo sounder.
Published in: NAVIGATION, Journal of the Institute of Navigation, Volume 12, Number 1
Pages: 60 - 67
Cite this article: Tyler, W. J., "AN AUTOMATIC SHIPBOARD DEPTH PLOTTING SYSTEM", NAVIGATION, Journal of The Institute of Navigation, Vol. 12, No. 1, Spring 1965, pp. 60-67.
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