feedback
Enter marine-related query and AI bot will look for best match in our DB.
 

To observe and plot lines of position locating an object or craft, particularly by bearings



Related Terms

CROSS BEARINGS

Two or more bearings used as intersecting lines of position for fixing the position of a craft

ANGLE OF CUT

The smaller angular difference of two bearings or lines of position

PLOTTING A POSITION

One of the most fundamental chart skills is being able to plot a position of known latitude & longitude, or, to determine latitude & longitude of a given position on the chart.

HOUR-GLASS EFFECT

A radarscope phenomenon which appears as a constriction or expansion of the display near the center of the plan position indicator, which can be caused by a nonlinear time base or the sweep plot starting on the radar indicator at the same instant as the transmission of the pulse. The phenomenon is most apparent when in narrow rivers or close to shore.

RELATIVE PLOT

A plot of the successive positions of a craft relative to a reference point, which is usually in motion. A line connecting successive relative positions of a maneuvering ship relative to a reference ship is called a RELATIVE MOVEMENT LINE. A relative plot includes relative movement lines and the position of the reference ship.

RADAR BEACON

A radar transmitter whose emissions enable a ship to deter- mine its direction and frequently position relative to the transmitter using the ship’s radar equipment. There are two general types of radar beacons: one type, the RACON, must be triggered by the ship’s radar emissions; the other type, the RAMARK transmits continuously and provides bearings only.

CHANNELS

Extension boarding at deck level to increase the width of the hull of a sailing ship for the lower stays land upon, thus providing a wider angle of mast support. The traditional position from which a seaman heaved a hand lead line (to establish depth).

ABAFT OF THE BEAM

Bearings over the beam to the stern, the ships after sections.

MATERIAL PARTICLE

An object which has rest-mass and an observable position in space, but has no geometrical extension, being confined to a single point. Also known as particle.

SWEEPING

  1. The process of towing a line or object below the surface, to determine whether an area is free from isolated submerged dangers to vessels and to determine the position of any dangers that exist, or to determine the least depth of an area. 2. The process of clearing an area or channel of mines or other dangers to navigation.

Related questions

MarineProHelp 2018 - 2020

First time here? Check out the FAQ!

If you've arrived to new location and wonder how to dress comfortably according to weather, check Comfiesto

×