, or sea-chart
A hydrographical map, or a projection of some part of the earth's superficies in plano, for the use of navigators, further distinguished as plane-charts, Mercator's charts, globular charts, and the bottle or current chart, to aid in the investigation of surface currents (all which see). A selenographic chart represents the moon, especially as seen by the aid of photography and Mr. De la Rue's arrangement.