Tide Mark to Trade Winds

The horizontal line worn on the shore, on a sea-wall, etc., which indicates the limit of high water. (See Tide Bench.)

(See Part I.)

(See Part I.)

(See Part I.)

The water of the ocean which is alternately elevated and depressed by the influence of the moon and sun.

(See Part I.)

(See Part I).

True Tide. A tide setting in a regular direction--not thrown out of its course by the intervention of land, etc.

Vulgar Establishment of the Port. Rough determination of the establishment of the port.

(See Apparent, Astronomical, Civil, Greenwich, Local, Mean, Mean-Solar, Ship, Sidereal, Solar, Standard, Star, and Sun Time; also Equation of Time.)

An azimuth calculated from the latitude, declination and hour-angle.

Altitude Azimuth. An azimuth calculated from the altitude, latitude and declination.

A sphere caused to drop from the summit of a pole at a specified hour, in order to indicate exact mean time.

To run time courses is to consider the speed of the vessel, the course sailed, and the time run on such course. This is employed during fog when navigation in waters where it is necessary to change the course of the vessel occasionally in order to keep in the channel, to avoid certain dangers, etc.

An observation of a heavenly body for the purpose of ascertaining the longitude; the chronometer time of the horizon contact of the image of the body being noted.

(See Troughton's Top.)

A delineation of the surface of a portion of the earth, showing natural objects, such as trees, rocks, etc.

(See Chart.)

(See Part I.)