Basic characteristics

To use a light as an aid to navigation, you first have to see it and secondly you have to identify it.
In the nautical chart it is symbolized by a purple exclamation point and/or by a purple circle.
The basic identification characteristics are the color of the light, the period and the phase characteristic.
The color of the light can be white, green, red or yellow.
If the color is green the abbreviation “G” is printed near the symbol; if the color is red, the abbreviation “R” is printed near the symbol; and if it is yellow the letter “Y” is printed.
There is no abbreviation for white light – only the purple circle.