Get Pub. No. 249 Vol. 1 Star Sight Reduction Form ... - The Nautical Almanac
How it works
-
Open form follow the instructions
-
Easily sign the form with your finger
-
Send filled & signed form or save
How to fill out the Pub. No. 249 Vol. 1 Star Sight Reduction Form online
This guide provides comprehensive instructions for users on how to complete the Pub. No. 249 Vol. 1 Star Sight Reduction Form, a vital tool in celestial navigation. By following these steps, you can ensure accurate data entry for effective star sight reductions.
Follow the steps to fill out the Star Sight Reduction Form accurately.
- Click the ‘Get Form’ button to access the Star Sight Reduction Form. This will allow you to open the document in your preferred editing environment.
- Begin by entering the 'Sight #' in the appropriate box. This number helps you keep track of the sequential sights you take during your navigation process.
- In the 'Star' section, list the name of the star you are observing. This is where you will provide clear identification of the celestial object.
- Input the 'DR Latitude' and 'DR Longitude'. Both should include the integral degree format, e.g., 'N 40°' or 'W 075°'. This data is critical for determining your position relative to the observed star.
- Record the 'Date' of your observation and ensure it aligns with Greenwich Mean Time (GMT). Use resources to convert your local time to GMT as needed.
- Fill in the 'UT' (Universal Time) based on the time you recorded your sighting. Make sure this reflects accurate time down to seconds.
- In the 'Hs' section, enter the height of the sextant measurement. This is the initial angle reading of the star during observation.
- Add any necessary corrections including 'Index Error' and 'Dip'. Utilize the appropriate correction tables as referenced in the form.
- For calculations that require 'GHA' (Greenwich Hour Angle), refer to The Nautical Almanac to obtain the correct figures based on your date and time of observation.
- Complete the form by filling out the remaining fields such as 'Hc', 'Zn', and 'Intercept'. Each section will require careful entry based on your sighting data and prior calculations.
- Once you finish filling out all sections, save your changes. You can also download, print, or share the form as required.
Start filling out your forms online today for precise celestial navigation!
They are designed to facilitate the practice of celestial navigation at sea. The tables are primarily used with the intercept method of sight reduction by entering arguments of latitude, declination and local hour angle and obtaining tabulated altitudes and azimuth angles.
Fill Pub. No. 249 Vol. 1 Star Sight Reduction Form ... - The Nautical Almanac
Height of your Eye above the water. 249 was designed originally for air navigation, it is now used primarily for marine navigation. These tables, designated as Volume 1 of the three-volume series of Pub. These tables were designed for air navigation where weight and space are at a premium, however, they are very popular with sailors too. 249 is faster to use but Pub. This has been up for a while. Here's how to perform a star sight reduction using Pub.
Industry-leading security and compliance
-
In businnes since 199725+ years providing professional legal documents.
-
Accredited businessGuarantees that a business meets BBB accreditation standards in the US and Canada.
-
Secured by BraintreeValidated Level 1 PCI DSS compliant payment gateway that accepts most major credit and debit card brands from across the globe.