Question

Navigators use a particular technique to sail in the sea? what is that explain?​

Answer 1

Answer:

Most modern navigation relies primarily on positions determined electronically by receivers collecting information from satellites. Most other modern techniques rely on crossing lines of position or LOP.[15]

A line of position can refer to two different things, either a line on a chart or a line between the observer and an object in real life.[16] A bearing is a measure of the direction to an object.[16] If the navigator measures the direction in real life, the angle can then be drawn on a nautical chart and the navigator will be on that line on the chart.[16]

In addition to bearings, navigators also often measure distances to objects.[15] On the chart, a distance produces a circle or arc of position.[15] Circles, arcs, and hyperbolae of positions are often referred to as lines of position.

If the navigator draws two lines of position, and they intersect he must be at that position.[15] A fix is the intersection of two or more LOPs.[15]

If only one line of position is available, this may be evaluated against the dead reckoning position to establish an estimated position.[17]

Lines (or circles) of position can be derived from a variety of sources:

celestial observation (a short segment of the circle of equal altitude, but generally represented as a line),

terrestrial range (natural or man made) when two charted points are observed to be in line with each other,[18]

compass bearing to a charted object,

radar range to a charted object,

on certain coastlines, a depth sounding from echo sounder or hand lead line.

There are some methods seldom used today such as "dipping a light" to calculate the geographic range from observer to lighthouse.

Methods of navigation have changed through history.[19] Each new method has enhanced the mariner's ability to complete his voyage.[19] One of the most important judgments the navigator must make is the best method to use.[19] Some types of navigation are depicted in the table.

Explanation:

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