Welcome to the NavList Message Boards.

NavList:

A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    or...
       
    Reply
    Re: Exercise #16 High Altitude Sights near Noon
    From: Jeremy C
    Date: 2008 Jul 21, 11:06 EDT
    Hi Andres,
     
    This data came from the United States Coast Guard Question pool.  All given information is as it is written in the pool and the 0.1nm error in declination should not effect the plot enough to give the correct answer given the scale of the plotting sheets available (either universal or the larger scale PS 923 I think it is, but I can't remember the exact number).
     
    Jeremy
     
    In a message dated 7/21/2008 2:50:00 A.M. Eastern Daylight Time, aruiz@orona.es writes:
    Jeremy,

    The declination you has given, has 0.1' of error, see my calculations and the USNO data http://aa.usno.navy.mil/data/docs/celnavtable.php

    ¿This data came from the 1981 NA?

    For manual calculation of the fix, a plotting sheet or also a great scale nautical chart is used if available.

    Andrés


    -----Mensaje original-----
    De: NavList@fer3.com [mailto:NavList@fer3.com] En nombre de Anabasis
    Enviado el: miércoles, 16 de julio de 2008 18:35
    Para: NavList
    Asunto: [NavList 5863] Exercise #16 High Altitude Sights near Noon


    Exercise 16  Position near Noon by High Altitude Sight

    As promised, I am posting a couple of Celestial Navigation problems
    that were presented to me on my Last US Coast Guard Examination.  I am
    quoting them verbatim and will give a list of reference materials
    available in the exam if people wish to replicate my exam conditions.
    Reference materials:  1981 Almanac, Bowditch Vol 2- 1981 edition, HO
    229 Vol 2, Plotting sheets, plotting tools, non-navigational
    calculator, writing instrument.

    Here is the problem and multiple choice options:
    "On 13 November 1981, your 1030 ZT DR position is Lat 19 deg 03'S,
    Long 6 deg 34'E.  You are on course 164 deg T, speed 12 knots.  You
    take the following observations of the Sun:
    Zone Time    GHA        Declination    Observed Altitude (Ho)
    1112        351 deg 55.4'    S 18 deg 00.4'    88 deg 08.0'
    1121        354 deg 10.4'    S 18 deg 00.5    88 deg 33.9'

    What is the 1200 position?"

    A)    Lat 19 deg 22.3'S, Long 6 deg 37.8'E
    B)    Lat 19 deg 20.1'S, Long 6 deg 41.4'E
    C)    Lat 19 deg 17.6'S, Long 6 deg 39.2'E
    D)    Lat 19 deg 15.8'S, Long 6 deg 36.8'E

    As a note, the answer MUST be one of the multiple choice options.  If
    your fix does not match the choices, you must choose the one you think
    is most correct.  As you can see, this is mostly a plotting exercise.
    I suggest using the largest scale plotting sheet you can muster.

    Jeremy

    U.S. Naval Observatory
    Astronomical Applications Department


    Celestial Navigation Data

     
                Celestial Navigation Data for 1981 Nov 13 at 11:12:00 UT           
                                                                                   
                     For Assumed Position:  Latitude    S  19 03.0                 
                                            Longitude   E   6 34.0                 
                                                                                   
                            Almanac Data                |    Altitude Corrections  
     Object       GHA        Dec         Hc       Zn    |   Refr   SD    PA    Sum 
                  o   '      o   '      o   '       o   |     '     '     '     '  
     SUN        351 55.4   S18 00.3   +88 13.7    54.1  |    0.0  16.2   0.0  16.1 
     VENUS      301 28.7   S26 40.2   +41 50.4   109.2  |   -1.1   0.2   0.2  -0.7 
     MARS        55 13.1   N 8 09.5   +23 19.9   288.2  |   -2.3   0.0   0.1  -2.2 
     JUPITER     14 48.1   S 9 28.1   +67 12.8   291.9  |   -0.4   0.3   0.0  -0.1 
     SATURN      23 36.3   S 4 43.6   +57 16.6   292.1  |   -0.6   0.1   0.0  -0.5 
     ACRUX       34 05.8   S62 59.5   +38 03.2   202.1  |   -1.3   0.0   0.0  -1.3 
     ALIOTH      27 11.1   N56 03.5   + 9 40.4   341.7  |   -5.5   0.0   0.0  -5.5 
     ALKAID      13 47.2   N49 24.3   +19 11.9   346.1  |   -2.8   0.0   0.0  -2.8 
     AL NA'IR   248 42.7   S47 03.2   + 4 19.0   138.6  |  -10.7   0.0   0.0 -10.7 
     ALPHARD     78 48.6   S 8 34.6   + 7 07.4   263.3  |   -7.2   0.0   0.0  -7.2 
     ALPHECCA   347 00.7   N26 46.7   +43 45.0     7.9  |   -1.0   0.0   0.0  -1.0 
     ALTAIR     283 00.8   N 8 49.3   +15 14.7    74.8  |   -3.6   0.0   0.0  -3.6 
     ANTARES    333 25.1   S26 23.4   +70 09.8   115.4  |   -0.4   0.0   0.0  -0.4 
     ARCTURUS     6 46.9   N19 16.8   +49 29.7   340.4  |   -0.8   0.0   0.0  -0.8 
     ATRIA      328 49.2   S68 59.7   +37 47.2   169.1  |   -1.3   0.0   0.0  -1.3 
     AVIOR       94 56.5   S59 26.7   +10 40.4   210.5  |   -5.0   0.0   0.0  -5.0 
     DENEBOLA    43 27.3   N14 40.5   +30 19.1   300.8  |   -1.7   0.0   0.0  -1.7 
     ELTANIN    311 26.6   N51 29.7   +10 29.1    25.1  |   -5.1   0.0   0.0  -5.1 
     GACRUX      32 57.2   S57 00.3   +42 07.8   207.9  |   -1.1   0.0   0.0  -1.1 
     GIENAH      36 46.2   S17 26.2   +48 54.7   265.0  |   -0.9   0.0   0.0  -0.9 
     HADAR        9 51.7   S60 16.9   +47 07.9   191.9  |   -0.9   0.0   0.0  -0.9 
     KAUS AUS   304 45.0   S34 23.7   +44 22.4   119.9  |   -1.0   0.0   0.0  -1.0 
     MENKENT      9 05.3   S36 16.6   +67 57.1   215.4  |   -0.4   0.0   0.0  -0.4 
     MIAPLACI    82 13.6   S69 38.2   +18 14.1   201.5  |   -3.0   0.0   0.0  -3.0 
     NUNKI      296 57.3   S26 19.2   +37 46.7   109.0  |   -1.3   0.0   0.0  -1.3 
     PEACOCK    274 26.2   S56 47.9   +21 50.0   144.6  |   -2.5   0.0   0.0  -2.5 
     RASALHAG   316 58.0   N12 34.5   +42 08.0    51.5  |   -1.1   0.0   0.0  -1.1 
     REGULUS     68 38.1   N12 03.5   + 9 40.0   286.4  |   -5.5   0.0   0.0  -5.5 
     RIGIL KE     0 54.5   S60 45.4   +47 57.4   185.4  |   -0.9   0.0   0.0  -0.9 
     SABIK      323 09.4   S15 42.1   +60 56.8    88.2  |   -0.6   0.0   0.0  -0.6 
     SHAULA     317 23.9   S37 05.5   +53 45.7   127.5  |   -0.7   0.0   0.0  -0.7 
     SPICA       19 25.9   S11 03.8   +63 41.6   283.9  |   -0.5   0.0   0.0  -0.5 
     SUHAIL      83 39.0   S43 21.2   +12 47.7   228.2  |   -4.2   0.0   0.0  -4.2 
     VEGA       301 24.5   N38 46.2   +14 25.3    39.4  |   -3.8   0.0   0.0  -3.8 
     ZUBENELG   358 01.4   S15 57.8   +84 38.7   304.5  |   -0.1   0.0   0.0  -0.1 
     ARIES      220 28.9                                                           
                                                                                   
     

    Notes on the data





    U.S. Naval Observatory
    Astronomical Applications Department


    Celestial Navigation Data

     
                Celestial Navigation Data for 1981 Nov 13 at 11:21:00 UT           
                                                                                   
                     For Assumed Position:  Latitude    S  19 03.0                 
                                            Longitude   E   6 34.0                 
                                                                                   
                            Almanac Data                |    Altitude Corrections  
     Object       GHA        Dec         Hc       Zn    |   Refr   SD    PA    Sum 
                  o   '      o   '      o   '       o   |     '     '     '     '  
     SUN        354 10.4   S18 00.4   +88 44.6   326.0  |    0.0  16.2   0.0  16.1 
     VENUS      303 43.7   S26 40.1   +43 51.0   109.1  |   -1.0   0.2   0.2  -0.7 
     MARS        57 28.3   N 8 09.4   +21 18.2   287.2  |   -2.5   0.0   0.1  -2.4 
     JUPITER     17 03.4   S 9 28.1   +65 13.1   289.4  |   -0.5   0.3   0.0  -0.2 
     SATURN      25 51.7   S 4 43.6   +55 17.3   290.2  |   -0.7   0.1   0.0  -0.5 
     ACRUX       36 21.2   S62 59.5   +37 14.3   202.9  |   -1.3   0.0   0.0  -1.3 
     ALIOTH      29 26.5   N56 03.5   + 8 59.0   340.6  |   -5.9   0.0   0.0  -5.9 
     ALKAID      16 02.5   N49 24.3   +18 39.7   344.7  |   -2.9   0.0   0.0  -2.9 
     AL NA'IR   250 58.1   S47 03.2   + 5 44.0   138.0  |   -8.7   0.0   0.0  -8.7 
     ALPHARD     81 04.0   S 8 34.6   + 5 00.4   262.6  |   -9.6   0.0   0.0  -9.6 
     ALPHECCA   349 16.0   N26 46.7   +43 59.6     5.2  |   -1.0   0.0   0.0  -1.0 
     ALTAIR     285 16.1   N 8 49.3   +17 17.9    73.9  |   -3.1   0.0   0.0  -3.1 
     ANTARES    335 40.5   S26 23.4   +72 04.5   117.4  |   -0.3   0.0   0.0  -0.3 
     ARCTURUS     9 02.3   N19 16.8   +48 43.6   337.4  |   -0.9   0.0   0.0  -0.9 
     ATRIA      331 04.6   S68 59.7   +38 10.4   170.0  |   -1.3   0.0   0.0  -1.3 
     AVIOR       97 11.9   S59 26.7   + 9 35.9   210.1  |   -5.5   0.0   0.0  -5.5 
     DENEBOLA    45 42.7   N14 40.5   +28 28.5   299.5  |   -1.8   0.0   0.0  -1.8 
     ELTANIN    313 42.0   N51 29.7   +11 22.2    23.9  |   -4.7   0.0   0.0  -4.7 
     GACRUX      35 12.5   S57 00.3   +41 07.1   208.8  |   -1.1   0.0   0.0  -1.1 
     GIENAH      39 01.6   S17 26.2   +46 47.3   264.5  |   -0.9   0.0   0.0  -0.9 
     HADAR       12 07.1   S60 16.9   +46 39.9   193.4  |   -0.9   0.0   0.0  -0.9 
     KAUS AUS   307 00.3   S34 23.7   +46 13.1   120.2  |   -1.0   0.0   0.0  -1.0 
     MENKENT     11 20.7   S36 16.6   +66 39.9   218.8  |   -0.4   0.0   0.0  -0.4 
     MIAPLACI    84 29.0   S69 38.2   +17 27.3   201.4  |   -3.1   0.0   0.0  -3.1 
     NUNKI      299 12.7   S26 19.2   +39 47.7   108.8  |   -1.2   0.0   0.0  -1.2 
     PEACOCK    276 41.6   S56 47.9   +23 04.1   144.6  |   -2.3   0.0   0.0  -2.3 
     RASALHAG   319 13.4   N12 34.5   +43 46.7    49.5  |   -1.0   0.0   0.0  -1.0 
     REGULUS     70 53.4   N12 03.5   + 7 37.1   285.6  |   -6.8   0.0   0.0  -6.8 
     RIGIL KE     3 09.8   S60 45.4   +47 43.4   187.1  |   -0.9   0.0   0.0  -0.9 
     SABIK      325 24.8   S15 42.1   +63 04.7    87.3  |   -0.5   0.0   0.0  -0.5 
     SHAULA     319 39.3   S37 05.5   +55 26.5   128.6  |   -0.7   0.0   0.0  -0.7 
     SPICA       21 41.2   S11 03.8   +61 36.9   282.2  |   -0.5   0.0   0.0  -0.5 
     SUHAIL      85 54.4   S43 21.2   +11 12.6   227.8  |   -4.8   0.0   0.0  -4.8 
     VEGA       303 39.8   N38 46.2   +15 45.5    38.2  |   -3.4   0.0   0.0  -3.4 
     ZUBENELG     0 16.7   S15 57.8   +82 46.8   294.2  |   -0.1   0.0   0.0  -0.1 
     ARIES      222 44.2                                                           
                                                                                   
     

    Notes on the data






    Get fantasy football with free live scoring. Sign up for FanHouse Fantasy Football today.

    --~--~---------~--~----~------------~-------~--~----~
    Navigation List archive: www.fer3.com/arc
    To post, email NavList@fer3.com
    To unsubscribe, email NavList-unsubscribe@fer3.com
    -~----------~----~----~----~------~----~------~--~---

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join NavList

    Name:
    (please, no nicknames or handles)
    Email:
    Do you want to receive all group messages by email?
    Yes No

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

    Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.
    Email:

    Email Settings

    Posting Code:

    Custom Index

    Subject:
    Author:
    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site