RDL FM 6-300 Download Information

FM 6-300 Download InformationThe RDL supports several different file download formats. If you are uncertain how to download a file or what viewer is needed, consult the Download Instructions.

FM 6-300 is available for downloading in the following formats:

Adobe Portable Document Format (PDF) Files

FM 6-300 Table of Contents

FM 6-300 Preface

FM 6-300 Chapter 1

FM 6-300 Chapter 2

FM 6-300 Authorization

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Download/Viewer Instructions

RDL Download/Viewer Instructions

General:

The RDL provides documents in several popular formats that can be downloaded for use on a local computer. Not all documents have an available download version. The Download Instructions Icon only appears for those documents that have an available download version. Once a file is downloaded, a software application is needed to view or manipulate the document. These instructions only provide a general overview of the download process. If after reading them you still have questions, we recommend you consult local technical resources to help you with your particular configuration.

Download:

Downloading is not difficult. The process varies, depending on the type of computer you use, which operating system it runs, what software you use to access the World Wide Web, and how the download itself is packaged. But overall, it's pretty straightforward. Follow the steps below:

● Make a Download Directory: Downloading can get messy. Unless you neatly file away new publications, you'll be buried under a cluttered desktop, lost files, and overflowing folders. To keep track of downloaded publication files, you should save them in a special download folder or directory that you can use over and over. Once you create this folder and call it something obvious, say, Downloads, you'll always know where to find your new downloaded files.

● Start the Download: Some documents have more than one file type for download, to include compressed files that are faster to download. Click on the download format you want to start the download. After you've started a download, your Web browser determines what happens next. The document opens in the appropriate format or you get a dialog box that confirms where to save your download. Before you click OK, make sure you've picked the Download folder you created. This is important, to ensure you know of where your download file is on your computer hard drive.

● Decompress Your Download: Compressed files are useful for bundling a group of files together and reducing the file size of a download. If you selected a compressed file for download from the RDL, you will need to decompress it before you can use it. Compressed files in the RDL end in a file extension of .exe, which identifies them as self extracting files. Simply double click on the file and it will automatically decompress. During the process, you will be prompted to pick a location of where the decompressed files should be written. Pay attention to this and be mindful of what you select or you will have difficulty finding the files once they have been decompressed.

● View/Manipulate the Document: Once a file is decompressed, it can be viewed

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Download/Viewer Instructions

or manipulated with an application. You may already have the application installed on your system. The easiest way to determine this is to double click the file. If the application is installed on your system, double clicking the file name will launch the appropriate application or prompt you to select an application to use with the file. If you are prompted to select an application, the system is telling you that you do not have an application installed that recognizes the file format. Rest easy, you do not have to run out and buy Microsoft Word (or some other software application) to view an RDL file. There are free viewers that can be downloaded and used to view the file. Visit our Download Viewers page for links to viewers that work with files in the RDL.

Download Formats:

The document format determines the software required to view it.

● Portable Document Format (.pdf) Files: Files with a PDF file extension require Adobe Acrobat Reader to be installed on your computer.

● Microsoft Word (.doc) Files: Files with a DOC file extension require Microsoft Word or Word Viewer to be installed on your computer.

● Microsoft PowerPoint (.ppt) Files: Files with a PPT file extension require Microsoft PowerPoint or PPT Viewer to be installed on your computer.

● Rich Text Format (.rtf) Files: Files with an RTF file extension can be opened in MS Word.

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Download Viewers Select

Download Viewers provides you the capability to download, direct from its source, software for the most popular, and current, World Wide Web/Internet browsers, and viewers/plug-ins for file formats available within the library.

Not all software is free. Select the provider/software of interest and follow the on-screen instructions. From here you can also return to UTILITIES or the Library HOMEPAGE.

The appearance of this hyperlink does not constitute endorsement by the Department of the Army. All links to non-U.S. Government sites or services are provided solely for your convenience. Use of such links on this web site are not an endorsement of the information, products or services provided by such sites. For other than authorized activities such as military exchanges and Morale, Welfare and Recreation sites, the Department of the U.S. Army does not exercise any editorial control over the information you may find at this location. This link is provided consistent with the stated purpose of this DoD web site.

Listed below are software packages that may be needed to access some of the Library content. You only need to obtain this software if you have a need to see content that you current software does not support.

WWW Browsers

The ADTDL uses HTML as its primary format for displaying information. The Library takes advantage of many advanced features of HTML (such as frames, and nested tables). Users are encouraged to regularly upgrade to the latest WWW browsers. They will not only provide you with a richer WWW experience, but will also keep you up to date with the current technology. You may be missing a lot if you don't.

The following WWW browsers have been tested by the Library staff:

Netscape Communicator 4.x

Microsoft Internet Explorer 5.x

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Portable Document Format (PDF)

Several documents are available in Portable Document Format (PDF) for print-on-demand. Unlike HTML, PDF represents the page exactly as it appears in the printed book (including page numbers, and multiple column text).

Acrobat Reader software is required to view PDF files. It is provided free from Adobe Systems Incorporated. Acrobat Reader can be used as a WWW Browser plug-in, or as an external viewer.

Adobe Acrobat Reader

Microsoft Word (DOC)

Some documents are available in Microsoft Word (DOC) format for print-on-demand. For users who don't have Microsoft Word installed on their PC, Microsoft has made available a free viewer that will display, and print Word files. This viewer is only available for PCs running Microsoft Windows 3.1x, 95, or NT

Microsoft Word Viewer 97

Microsoft PowerPoint (PPT)

Some slide show presentations were prepared using Microsoft PowerPoint (PPT). Users who don't have Microsoft PowerPoint installed on their PC can use the free PowerPoint viewer.

Microsoft PowerPoint Viewer 97

RealNetworks Audio/Video

Some material was prepared using RealNetworks Audio/Video. Users who don't have the Real Player installed on their PC can use the free player available from RealNetworks.

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Real Player

Toolbook Courseware (TBK)

Some courseware in the Library were developed with the Asymetrix Toolbook distributed learning package. These packages can be viewed using the Neuron Plug-In.

Asymetrix Neuron Plug-In

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*FM 6-300

i

FM 6-300

PREFACEThis manual is a compilation of tables and charts which are used in field computations of astronomicalobservations by the field artillery. These tables and charts are compiled and provided by the AstronomicalApplications Department, US Naval Observatory H. M. Nautical Almanac Office, Royal GreenwichObservatory; and National Oceanic Atmospheric Administration.

This manual reflects the update of data to encompass the years 1993 through 1997. It is designed to beused in conjunction with FM 6-2, Field Artillery Survey.

The proponent of this publication is HQ TRADOC. Send comments and recommendations on DA Form2028 (Recommended Changes to Publications and Blank Forms) directly to:

CommandantUS Army Field Artillery SchoolATTN: ATSF-DDFort Sill, Oklahoma 73503-5600

ii

FM 6-300

CHAPTER 1INTRODUCTION

1-1. PURPOSE AND SCOPEa. This manual is a compilation of tables and charts for usein computing astronomical azimuths for the field artillery.These tables and charts are used for computing azimuth ofthe Sun or selected stars by either the altitude or ArtilleryAstronomic Observation method. Special tables (Tables 12through 12e), which are tabular methods of computingPolaris, are included for a rapid computation of a Polarisazimuth. Tables and charts are also included to correctastronomic azimuth to grid azimuth and to extend azimuth bysimultaneous observation.

b. Data contained in Tables 2a, 2b, 2c, 2d, 2e, 10a(l),10a(2) 10a(3), 10a(4), 10a(5), 10b(l), 10b(2), 10b(3),10b(4), 10b(5), 11a, llb, llc, lld, 11e, 12a, 12b, 12c, 12d,and 12e are current only for the years in which the manualis effective.

1-2. DESCRIPTION OF TABLES AND CHARTSThis manual is intended to be used as a companionpublication to FM 6-2, Field Artillery Survey. Details onthe computation of astronomical azimuth and the use ofthese tables and charts are contained in FM 6-2.

1-1

FM 6-300

CHAPTER 2

ASTRONOMICAL TABLES AND CHARTS

Table 1a. Astronomic refraction corrected for temperature (degrees)

TO BE SUBTRACTED FROM OBSERVED ALTITUDE OF SUN OR STAR

(Use values of observed altitude and temperature nearest the values tabulated as arguments.)

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FM 6-300 23 JULY 1992

By Order of the Secretary of the Army:

GORDON R. SULLIVANGeneral, United States Army

Chief of Staff

Official:

MILTON H. HAMILTONAdministrative Assistant to the

Secretary of the Army01849

DISTRIBUTION:

Active Army, ARNG, and USAR: To be distributed in accordance with DA Form 12-11 E. Requirements for TheArmy Ephemeris (Qty rqr block no. 781).

★ U. S. GOVERNMENT PRINTING OFFICE : 1994 - 300-421 (02260)