# What is the use of parallel sailing?

Contents

## What is parallel sailing?

: spherical sailing in which the course is along a parallel and departure is the product of cosine latitude times the difference of longitude —opposed to meridian sailing.

## What is the difference between parallel sailing and plane sailing?

Whenever ship sails on a east or west course, it is called parallel sailing. The distance travelled on this course along parallel of latitude is equal to departure. When ship sails along a rhumb line, it is called plane sailing. Rhumb line is a line on surface of earth which cut all meridians at same angle.

## What is the purpose and advantage of using composite sailing?

Composite sailing (see Article 2402 Page 2 346 THE SAILINGS and Article 2410) may save time and distance over the rhumb line track without leading the vessel into danger.

## Why do we use Mercator sailing?

* Mercator sailing is another method of Rhumb line sailing . * It is used to find the course and distance between two position that are in different latitude from the large d’lat and distance.

## What are meridional parts?

: the linear length of one minute of longitude on a Mercator chart.

## What is transverse sailing?

: plane sailing in which a ship follows two or more courses in succession with the difference in latitude and departure being added algebraically to find a single resultant course and distance.

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## What is Meridian sailing?

: sailing north or south —opposed to parallel sailing.

## What is composite sailing?

: a combination of great circle and parallel sailing in navigation.

## What is the advantage of using great circle sailing?

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 a rhumb line used for?

A Rhumb Line (also known as a loxodrome) is a line on the earth’s surface that crosses all meridians at the same angle. It is used as the standard method of plotting a ship’s course on a chart.