# What are the items to compute in a great circle sailing problem?

Contents

formula : cos gc = (sine lat a * sine lat b) + (cos lat a * cos lat b * cos longitude diff.)

## What is the concept of great circle sailing?

Definition of great-circle sailing

: the navigation or conducting of a ship on a great-circle track or on a course determined in relation to a great-circle track — compare sailing.

## How do you calculate great circle sailing?

formula : cos gc = (sine lat a * sine lat b) + (cos lat a * cos lat b * cos longitude diff.)

## How do you calculate great circle?

We can work out the length e directly, as the great circle between P and S is the line of longitude, so e2=4haversin(ϕ2−ϕ1).

## When solving great circle sailing the vertex is A?

The vertex is the point on a great circle that is closest to the pole; by knowing the latitude of the vertex, if it is too high. There are two vertices on a great circle, 180° apart; the nearer vertex is usually the chosen one for navigational calculation.

## How does great circle navigation work?

great circle route, the shortest course between two points on the surface of a sphere. It lies in a plane that intersects the sphere’s centre and was known by mathematicians before the time of Columbus. … Long-distance air traffic uses great circle routes routinely, saving time and fuel.

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## What is a great circle chart?

The great circle track is the shortest distance between two places on the earth’s surface. The great circle track appears as a straight line on Gnomonic (great circle) charts. The vertices of a great circle are the two points nearest to the poles which have a course on the great circle track due EAST / WEST.

## What is a composite great circle?

A method of sailing along the shortest route possible without crossing poleward of a specified latitude. … This comprises two great circle routes, the first starting at the place of departure with its vertex on a limiting parallel of latitude.

## How do you calculate loxodrome?

The Loxodrome Equation in the Mercator Projection

It is determined by 180°/PI = 57.2958 °/rad. This scaling of the Latitude axis assures that – on the Equator – the distance of one degree of Latitude equals the distance of one degree of Longitude.

## What is the advantage of a great circle?

The advantage of a great circle is obvious, the shorter distance. The disadvantages, depending on latitude, could be quite a few. Colder weather, stronger winds, higher seas and perhaps even icebergs.

## What is an example of a great circle?

The Equator is another of the Earth’s great circles. If you were to cut into the Earth right on its Equator, you’d have two equal halves: the Northern and Southern Hemispheres. The Equator is the only east-west line that is a great circle.