[NA] ID compass / ??

Discussion in 'Hangar Talk' started by Let'sgoflying!, Jan 16, 2023.

  1. Let'sgoflying!

    Let'sgoflying! Touchdown! Greaser!

    Joined:
    Feb 23, 2005
    Messages:
    19,413
    Location:
    west Texas

    Display name:
    Dave Taylor
    I inherited this device, but can’t figure the purpose of, or how to use one side.
    Or the roller at the bottom.
    Or what industry might have needed it.
    The source is a Navy man. AAB326DE-F6D2-4DFB-9973-147729415724.jpeg 3EB5751A-FAB4-4CA0-A523-35A888DEF98A.jpeg
     
  2. Van Johnston

    Van Johnston Pattern Altitude

    Joined:
    Oct 31, 2012
    Messages:
    1,518
    Location:
    South Texas

    Display name:
    Van Johnston
    It measures the distance on a map. I have one. Let me see if it has instructions.

    I think.
     
    Let'sgoflying! likes this.
  3. Let'sgoflying!

    Let'sgoflying! Touchdown! Greaser!

    Joined:
    Feb 23, 2005
    Messages:
    19,413
    Location:
    west Texas

    Display name:
    Dave Taylor
    The roller, when spun does not appear to do anything.
    The distance needle appears stuck.
     
  4. Sac Arrow

    Sac Arrow Touchdown! Greaser!

    Joined:
    May 11, 2010
    Messages:
    19,404
    Location:
    Charlotte, NC

    Display name:
    Action Figure Model
    It is called an opisometer. It measures the distance between curved lines on a map. Unstuck, the distance needles would give a distance reading.
     
    Jim K and Let'sgoflying! like this.
  5. Let'sgoflying!

    Let'sgoflying! Touchdown! Greaser!

    Joined:
    Feb 23, 2005
    Messages:
    19,413
    Location:
    west Texas

    Display name:
    Dave Taylor
    cool!
    Something to look up and learn about.
    Will it work on my Garmin moving map?
     
  6. Jim K

    Jim K En-Route PoA Supporter

    Joined:
    Mar 31, 2019
    Messages:
    3,994
    Location:
    CMI

    Display name:
    Insert cool name here
    Just as well as on a paper map until you get that needle fixed :D
     
  7. luvflyin

    luvflyin Touchdown! Greaser!

    Joined:
    May 8, 2015
    Messages:
    14,265
    Location:
    Vancouver, WA

    Display name:
    Luvflyin
    Have you tried to push the thing on the top or give it a twist or something? Like to reset it to zero?
     
  8. Dana

    Dana En-Route

    Joined:
    Oct 19, 2016
    Messages:
    3,311
    Location:
    CT & NY

    Display name:
    Dana
    Sounds like something is broken or loose inside.

    I have one of these, not exactly the same. I use it to measure trail lengths on maps for hiking.
     
    Let'sgoflying! likes this.
  9. Let'sgoflying!

    Let'sgoflying! Touchdown! Greaser!

    Joined:
    Feb 23, 2005
    Messages:
    19,413
    Location:
    west Texas

    Display name:
    Dave Taylor
    yeah, it does not push/pull but I successfully unscrewed it & it fell off!
     
  10. Jim_R

    Jim_R Cleared for Takeoff

    Joined:
    Feb 17, 2010
    Messages:
    1,488

    Display name:
    Jim
    upload_2023-1-17_9-11-29.png
     
    nauga and Let'sgoflying! like this.