Raketa Wind Rose

4991866 · Manual winding · 40 mm
Basic info
Brand
Raketa
Model
Azimuth
Type
Military/Field
Reference
4991866
Movement
Type
Manual winding
Caliber
2609.NP
Case
Diameter X
40 mm
Thickness
12 mm
Case material
Steel
Bezel material
Steel
Water resistance
3 ATM
Dial
Color
Silver
Markers
Arabic numerals
Glass
Mineral Glass
Bracelet/strap
Material
Leather
Color
Black
Type of clasp
Buckle
Clasp material
Steel
Complications
Equation of time

Description

The earliest Wind Rose appeared on navigation charts used in the 13th century by Italian and Spanish sailors.

Before the development of the compass rose, a wind rose was included on maps to let the reader know which direction the 8 major winds blew within the plan view.

The Wind Rose is presented in a circular format with the length of each spoke around the circle related to the frequency of the wind blowing from a particular direction over specified period. Each concentric circle represents a different frequency emanating from zero at the center to increasing frequencies at the outer circles.

This technology dates back to Athens 50 BC in the form of the Tower of Winds which was an octagonal tower with eight reliefs of the winds near the top. It was designed by Andronicus of Cyrrhus with the idea of planning city road orientation to maximize benefits and minimize harms from various winds.