What is an azimuth circle?
An azimuth is the direction measured in degrees clockwise from north on an azimuth circle. An azimuth circle consists of 360 degrees. Ninety degrees corresponds to east, 180 degrees is south, 270 degrees is west, and 360 degrees and 0 degrees mark north.
What is an azimuth circle use for?
azimuth circle in American English noun. a device for measuring azimuths, consisting of a graduated ring equipped with a sighting vane on each side, which fits concentrically over a compass.
What is an azimuth mirror circle?
An azimuth circle is an instrument for determining both bearings of terrestrial objects and azimuths of celestial body. This is a nonmagnetic metal ring. It is an auxiliary instrument of the compass. It consists of a prism mounted on a horizontal axis above and inclined to in which there is a magnifying lens.
How do you use azimuth circle to obtain bearings?
Rotate the azimuth ring until the orienting arrow lines up with the magnetic needle. Be sure the north end of the needle (usually red) points to N, not S. Find where the degree markings around the azimuth ring line up with the direction-of-travel arrow. That degree mark is your bearing.
What part of the azimuth circle that is fitted with sighting vanes?
The azimuth circle is fitted with two sighting vanes. The forward or far vane has a vertical wire and the after or near vane has a peep sight….PILOTING INSTRUMENTS.
| 2 fm | 2 strips of leather |
|---|---|
| 20 fm | line with two knots |
What is an azimuth ring on a compass?
noun. a device for measuring azimuths, consisting of a graduated ring equipped with a sighting vane on each side, which fits concentrically over a compass.
What is azimuth bearing?
Azimuths are defined as horizontal angles that are measured from the reference meridian in the clockwise direction. Azimuths are also called a whole circle bearing system(W.C.B). Azimuths are used in compass surveying, plane surveying, where it is generally measured from the north.
What is sighting pelorus?
pelorus in British English (pɪˈlɔːrəs ) nounWord forms: plural -ruses. a sighting device used in conjunction with a magnetic compass or a gyrocompass for measuring the relative bearings of observed points.
How do you find azimuth on a compass?
(d) To measure an azimuth, turn your entire body toward the object and point the compass cover directly at the object. Look down and read the azimuth from beneath the fixed black index line. This method can be used at night.
How does a pelorus work?
Pelorus systems work by providing bearings from fixed positions, normally on the vessel bridge wings, to specific targets visible to the mariner and identified on the navigation chart.