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GPS jamming by Lightsquared - Wednesday, February 02, 2011

Lightsquared, who are developing a wireless data network, have been granted permission to use frequencies that are used by GPS, even though t is proven that thios will stop GPS receivers from operating near their transmitters. Luckily, sextants are not affected!

 read more ...
WinAstro reviewed by PBO - Tuesday, January 25, 2011

Practical Boat Owner has reviewed WinAstro and given it a very good *** rating. You can read the review here on the ybw.com web site.

 
Mike Richey passed away - Tuesday, January 25, 2011

Mike Richey, expert on astro navigation and famous for his single-handed races across the Atlantic in the 26 foot junk rigged boat "Jester", passed away on 26th December at the age of 92. He was also one of the founders of the Royal Institute of Navigation, and served an apprenticeship with the sculptor and typrographer Eric Gill.
Read his obituary here.

 
WinAstro reviewed by Sejl magazine - Friday, July 30, 2010

The Norwegian magazine Seil has reviewed WinAstro. The report, written by Terje Bølstad, is available for reading on Seil's web site - he has been an enthusiastic user of WinAstro for many years..

 
WinAstro now with Planetarium Software - Friday, July 30, 2010

WinAstro is now supplied with a separate planetarium program, Stellarium, that lets you see the sky at night from your location, and identify the stars, planets and constellations. This helps you identify the body you want to take a sight on, and more generally to identify all the objects in the sky - a great way to make those night watches more interesting!

 
GPS jamming by Lightsquared - Wednesday, February 02, 2011

Lightsquared, who are developing a wireless data network, have been granted permission to use frequencies that are used by GPS, even though t is proven that thios will stop GPS receivers from operating near their transmitters. Luckily, sextants are not affected!

 read more ...
WinAstro reviewed by PBO - Tuesday, January 25, 2011

Practical Boat Owner has reviewed WinAstro and given it a very good *** rating. You can read the review here on the ybw.com web site.

 
Mike Richey passed away - Tuesday, January 25, 2011

Mike Richey, expert on astro navigation and famous for his single-handed races across the Atlantic in the 26 foot junk rigged boat "Jester", passed away on 26th December at the age of 92. He was also one of the founders of the Royal Institute of Navigation, and served an apprenticeship with the sculptor and typrographer Eric Gill.
Read his obituary here.

 
WinAstro reviewed by Sejl magazine - Friday, July 30, 2010

The Norwegian magazine Seil has reviewed WinAstro. The report, written by Terje Bølstad, is available for reading on Seil's web site - he has been an enthusiastic user of WinAstro for many years..

 
WinAstro now with Planetarium Software - Friday, July 30, 2010

WinAstro is now supplied with a separate planetarium program, Stellarium, that lets you see the sky at night from your location, and identify the stars, planets and constellations. This helps you identify the body you want to take a sight on, and more generally to identify all the objects in the sky - a great way to make those night watches more interesting!

 
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You are here > Using WinAstro > Line of Position
English (United States)

Linea di posizione

WinAstro - Line of Position

Line of Position

This screen shows your line of position (LOP), calculated from your sextant reading and time of sight.

The green dot shows your position, with the green line showing you are heading East in this case.

The red line is your line of position, with the cross showing the closest point on the line of position to your initial estimated position.

On the left, the position of the cross is given, together with a list of points that lie on the line of position, which helps you plot the LOP onto a chart, should you so wish.

At the bottom, the azimuth and intercept - the bearing and distance from your estimated position to the red cross - are given.

If you are satisfied with the sight, then edit the comment if you wish, and click on the Accept button. This will update your DR position and also make an entry into the sight log.

If you are not satisfied (for example if the intercept is excessively high, indicating a poor sight), then just click on Close.

To calculate a position from two sights, whether a running fix or two sights taken on different bodies at about the same time, just repeat the sight process for each sight you take. The X marking your position is effectively a combination of your current sight and the previous one.

WinAstro - Line of Position

Line of Position

This screen shows your line of position (LOP), calculated from your sextant reading and time of sight.

The green dot shows your position, with the green line showing you are heading East in this case.

The red line is your line of position, with the cross showing the closest point on the line of position to your initial estimated position.

On the left, the position of the cross is given, together with a list of points that lie on the line of position, which helps you plot the LOP onto a chart, should you so wish.

At the bottom, the azimuth and intercept - the bearing and distance from your estimated position to the red cross - are given.

If you are satisfied with the sight, then edit the comment if you wish, and click on the Accept button. This will update your DR position and also make an entry into the sight log.

If you are not satisfied (for example if the intercept is excessively high, indicating a poor sight), then just click on Close.

To calculate a position from two sights, whether a running fix or two sights taken on different bodies at about the same time, just repeat the sight process for each sight you take. The X marking your position is effectively a combination of your current sight and the previous one.