25.3.2020 13:06:00

Navigation Maps and Features


Navigation charts have an important place for seafarers. These maps are very useful for seafarers as they help in finding a position at sea. If we give information about navigational maps and their properties.

• Latitude is shown in the “L” or “Lat” format on the navigational maps.

• Longitude values ​​are shown as “Long”

Seafarers generally need to know the latitude and longitude values. In line with these values, it is only necessary to interpret the navigation maps correctly and act accordingly.

Reading and Using Navigation Maps

The notes and warnings must be observed before using the navigation maps. The following information draws attention first in the navigation maps.

Map number: located in the lower right corner and the upper left corner.

Inscription of the Map: General information about how the map is made.


• Name, the logo of the organization that performs the printing

• The geographical area indicated on the map

• Resources used in map-making

• Height and depth units on the map

• Type of projection where the map is made

• Map scale

In the navigational maps, there are many details about ports, land markings, depths, cliffs, wrecks, shallow waters, seabed structure, open sea structure, fields, routes and borders, symbols. Seafarers need to be able to read the information provided here accurately and completely. This is one of the most important duties of every seafarer.

The projection method commonly used when creating navigational maps is the Equatorial method. This method is used as a standard method all over the world. It is made on a scale and is indicated on the scale used on the map. The upper part of the course always shows north. The spindle is used as a distance unit according to international standards. There is a difference in value between nautical miles and land miles.

These maps, in general, are extremely simple to use. Seafarers can use blind compasses and parallel rulers. Thanks to these aids, distance measurements can be made easily. Seafarers can make directions on this map and make routes. This is generally the case with navigational maps. Every seafarer should have this knowledge and be able to read and use the navigational maps.


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