Conversion between wind speed measurement units including Beaufort numbers, km/h, m/s, mph, fps.
The calculator gives name of compass point by direction angle in degrees.
Calculates true, magnetic and compass direction(course, bearing) by given direction, magnetic declination and deviation.
Calculation of a distance on loxodrome (rhumb line) and course angle (azimuth) between two points with a given geographical coordinates.
Calculates the distance between two point of the Earth specified geodesic (geographical) coordinates along the shortest path - the great circle (orthodrome). Calculates the initial and final course angles and azimuth at intermediate points between the two given.
This calculator calculates tidal gates using the rule of twelfths, estimating the height of the tide at any time, given only the time and height of high and low water.
The calculator converts english phrase to the flag semaphore signal sequence.
Nautical mile, sea mile, cable
Calculates the prospect distance from height at observer and line of sight distance between two observers.
This online calculator is intended for sunrise and sunset time calculation for given place and date. The calculator algorithm is obtained from the great book of Oliver Montenbruck and Thomas Pfleger "Astronomy on the Personal Computer".