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
    Errors in plotting and a possible/partial fix thereof, as mentioned in #14993.
    From: Alan S
    Date: 2010 Dec 27, 13:09 -0800

    Jeremy:

    Re errors mentioned regarding your efforts at MANUAL PLOTTING, as an old ex draftsman, the following comes to mind.

    Assuming that you are using the old #2 pencil, the lead therein is pretty soft, sharpen it often, try using a "draftsmans pencil sharpener/pointer" and fine sand paper or a fine cut flat file. Also use a light hand when drawing lines.

    If you use a "machanical pencil" actually a device that holds stick leads, again use a sharp point, along with a light hand. You might try a harder lead too. Leads designated H as in 2H, 3H get harder as numbers get higher, B series leads get softer, the HB lead is about equivalent to # 2 lead pencils. As I recall, 2B, 3B would be getting softer.

    Should you opt for the "Pentel Pencils", actually lead holders, try the 0.5mm diameter, the thinnest offered, use a hard lead, with a light hand. With the smaller diameter leads, hold the pencil close to vertical, as these small diameter leads tend to snap.

    I don't know what sort of a plotting sheet you use. For my purposes, the Power Squadron Constant Latitude Sheet (CLS98)serves, however as to reading latitudes, strikes me that the limit is .5 NM, though someone with younger eyes might be able to read to .25NM, though I think this is something of a stretch. As for the longitude scale, about .5 minutes seems to be a stopping point, though again, younger eyes might better this.

    Of course, if using a computer program to "plot" lop's, the computer's read out is in coordinates, lat. and long. isn't it. Ergo, no problems with the thickness of a pencil line.
    ----------------------------------------------------------------
    NavList message boards and member settings: www.fer3.com/NavList
    Members may optionally receive posts by email.
    To cancel email delivery, send a message to NoMail[at]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