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
    SOA vs Positions
    From: Irv Haworth
    Date: 2009 Nov 8, 15:59 -0800

    Does

    The plot thicken ?

    Dist.

    from

    11AM/12.00

    Is 34.8NM

    Which

    =34.8

    Seems to indicate positions are in error ?

    Notes

    date/time

    lat

    lon

    naut. miles run

    SOA

    wind from

    knots

    barom.

    wave height

    air temp

    dew point

    water temp

    2009-Nov-08 16:00

    S 44°24'

    E 167°00'

    43

    10.7

    220

    27

    1016.3

    1.5

    12.0

    10.2

    13.0

    2009-Nov-08 12:00

    S 44°24'

    E 166°00'

    35

    34.8

    220

    15

    1019.3

    0.5

    12.0

    2009-Nov-08 11:00

    S 44°18'

    E 165°12'

    290

    15.2

    250

    21

    1022.2

    13.0

    12.7

    13.0

     

    Please excuse my lead-in…it now appears the algorithm used must automatically calc. SOA based on Rhumb dist. In this case dist is 34.8 (my RL calc) and not 35 NM as NM  Run.

    What I am trying to determine : are data generated/reported automatically from a GPS  without any inputs from navigator, as well as SOA issue.

    ( I have been following the track of a large cruise ship across S. Pacific and now wondering what or who does what…with confidence. Reminds me of a quip in poor taste “if you drive then drink and face the traffic with confidence”).

     


    --~--~---------~--~----~------------~-------~--~----~
    NavList message boards: www.fer3.com/arc
    Or post by email to: 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