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There are numerous ways to determine gyro error while pierside. At a minium all methods below require accurate charts and a device for taking a line of position (i.e. bearing circle or sextant).
Here are the methods I know of:
Celestial fixes (i.e. Amplitude of the Sun or Azimuth of the Sun (or Polaris))
This method is complicated and time consuming. It requires knowledge of how to take celestial fixes as well as the Almanacs (or computer programs) to complete it.
Process:
Shoot a bearing to the celestial body.
Enter time and location (Latitude and Longitude) of fix into reduction tables (in Almanac). This provides the what the body should bear.
Subtract the bearing from Almanac from the visual bearing. Negative bearing error is to the East. Positive Error is to the West. Hopefully your error is less than 1 degree.
Pierside [visual] Fix / "Trial and Error"Method
This method is very time consuming but is simple enough for anyone with basic visual navigation skills to complete.
Process:
Shoot three (or more) lines of position (LOP).
Plot on chart. If you end up with a pinpoint fix then assume you have no gyro error. However, in the more likely case that the fix is not exact (looks like a triangle), estimate equal amounts of error for each LOP.
Repeat this method adding in error until you achieve a pinpoint fix. When pinpoint is achieved, whatever estimated error was used is the actual error.
Distant Object Method / Radian Rule Method
(I'll finish this response tomorrow)
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∙ 11y ago
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What is a good sentence for the word wharf?
My ship has arrived at the wharf. The wharf is on the north side of the marina.
How do you use wharf in a sentence?
The cargo ship docked at the nearest wharf to unload.
Why would a solid walled wharf be disadvantageous to ships attempting to pull alongside?
A solid-walled wharf is disadvantageous to ships pulling alongside because water currents are constrained and speed up between the ship and the wharf. This results in a reduced water pressure, and the normal pressure on the other side of the ship then forces the ship against the wharf. The pilings avoid this mishap by allowing the freer passage of water between the wharf and the ship.
What is a definition of docking?
The act of mooring a ship to a wharf.
What is a Place For Ship For Load And Unload?
That is a wharf or a dock.
What is a ship tied to while in port?
Quayside, dock, wharf, another ship, berth.
What is a sentence for wharf?
A wharf is a pier or landing place for boats. Here are some sentences.The tsunami washed the wharf away.Our ship docked at the closest wharf.Many warehouses are built close to a wharf for easy cargo unloading.
What is the advantage of gyro compass?
its getting to ship , wiring of the line of tube
What is the noun of wharf?
The noun 'wharf' is a singular, common, concrete noun; a word for a flat area to moor and unload a ship; a thing.
How do you steer with gyro error?
For my answer I will assume we are speaking of steering a ship.In order to steer with gyro compass error the error must be known. There are many ways to determine this (Azimuth of the Sun, Amplitude of the Sun, Azimuth of Polaris, Distant Object Method). Actually performing these is beyond the scope of this question however if you would like instructions how the American Practical Navigator is the place to go.Error is usually less than a degree. No ship's captain or master would be happy with bearing error in whole degrees.Once the error is know, simple arithmetic will allow you to steer the desired course. To obtain the course to steer the error is added to the desired true heading. Consider East error to be negative and West error to be positive. This is often remembered by using "East is Least; West is Best."Formula:S = Heading to steerE = ErrorD = Desired True HeadingS = D + E
How do you spell warf?
The likely word is wharf (a ship loading dock).
What is the name of the post on a pier that a ship is tied to with a hawser?
It is a "bollard." The hawser (rope) is attached to the bollard to anchor a ship in position at a pier or wharf.
