Stormy Weather SoftWare
Stormy Weather SoftWare
Systems consultant

 

Great circle sailing

Note: Enter degrees, minutes and decimal minutes or degrees, minutes, seconds and decimal seconds

Origin (Initial Position)

Latitude : degrees minutes seconds
Longitude : degrees minutes seconds

Destination (Final Position)

Latitude : degrees minutes seconds
Longitude : degrees minutes seconds

Results

Initial Course :

 degrees true
Great Circle Distance : nautical miles

Way Point Calculations

Way Point Longitude : degrees minutes seconds
Way Point Latitude : degrees minutes seconds
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Computing Mercator Sailing course and distance

Origin (Initial Position)

Latitude : degrees minutes
Longitude : degrees minutes

Destination (Final Position)

Latitude : degrees minutes
Longitude : degrees minutes

Results

Course to make : degrees true
Distance to make : nautical miles
Culmulative Distance : nautical miles
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Direction and Speed of True Wind Home Page

This form will compute the difference between ship heading and true wind direction and true wind speed. Difference between ship heading and apparent wind direction and apparent wind speed must be provided. Note that if apparent wind speed is supplied in knots, it is necessary to supply the ship speed in knots.

Difference Between Heading and
Apparent Wind Direction:		 (degrees)
Apparent Wind Speed:
(Specify Units)
  Units of Ship's Speed Knots
Ship's Speed: (knots)
Difference Between Heading
and True Wind Direction:		 (degrees)
True Wind Speed: (units of ship's speed)
  (knots)

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Sight Reduction

This page allows calculation of the data in the Sight Reduction Tables for Marine Navigation (Pub. No. 229).

The main purpose of this calculator is to facilitate the practice of celestial navigation at sea.  A secondary purpose is to provide the solutions of a spherical triangle of which two sides and the included angle are known and it is necessary to find the values of the third side and adjacent angle.

Latitude: (degrees)    SAME name as declination
  (minutes)    CONTRARY name to declination
Declination: (degrees)
  (minutes)
Local Hour Angle (LHA): (degrees)
  (minutes)
Altitude (Hc): (degrees)
(minutes)
Azimuth Angle (Z): (degrees)
(minutes)
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Height ofe eye / distance to horizon

Distance of the Horizon

Given the Height of Eye, Compute the Distance to the Horizon

Height of eye (specify units):
  feet meters
Distance to the Horizon: (Nautical Miles)
  (Statute Miles)
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Geographic Range

Given the Height of the Light Above Sea Level and the Height of the Eye of the Observer above Sea Level,
Compute the Geographic Range

Height of the Light above
Sea Level (specify units):
  feet meters
Height of the eye of the Observer
above Sea Level (specify units):
  feet meters
Geographic Range: (Nautical Miles)