Register | Login
United States Coast Guard Forums and Information
The World's Premiere Source for United States Coast Guard. Information and resources about the USCG, rules, regulations, policy, pay, jobs, forms, pay, locations, and more. auxiliary,faq,facts,manuals,boating rules,boating regulations,boating safety,inflatable boats, scuba diving,boating magazines,travel,boats,boat talk,boaters,boats for sale,boating information,survey,yacht,cruising,cruiser,sea,ocean,tide,current,weather,marine,ships,inflatables,fishing,fisherman,cutter,boat navigation,wind,chart,navigator,powerboat,sailboat,sailing,opinion The World's Premiere Source for United States Coast Guard. Information and resources about the USCG, rules, regulations, policy, pay, jobs, forms, pay, locations, and more. auxiliary,faq,facts,manuals,boating rules,boating regulations,boating safety,inflatable boats, scuba diving,boating magazines,travel,boats,boat talk,boaters,boats for sale,boating information,survey,yacht,cruising,cruiser,sea,ocean,tide,current,weather,marine,ships,inflatables,fishing,fisherman,cutter,boat navigation,wind,chart,navigator,powerboat,sailboat,sailing,opinion The World's Premiere Source for United States Coast Guard. Information and resources about the USCG, rules, regulations, policy, pay, jobs, forms, pay, locations, and more. auxiliary,faq,facts,manuals,boating rules,boating regulations,boating safety,inflatable boats, scuba diving,boating magazines,travel,boats,boat talk,boaters,boats for sale,boating information,survey,yacht,cruising,cruiser,sea,ocean,tide,current,weather,marine,ships,inflatables,fishing,fisherman,cutter,boat navigation,wind,chart,navigator,powerboat,sailboat,sailing,opinion The World's Premiere Source for United States Coast Guard. Information and resources about the USCG, rules, regulations, policy, pay, jobs, forms, pay, locations, and more. auxiliary,faq,facts,manuals,boating rules,boating regulations,boating safety,,inflatable boats, scuba diving,boating magazines,travel,boats,boat talk,boaters,boats for sale,boating information,survey,yacht,cruising,cruiser,sea,ocean,tide,current,weather,marine,ships,inflatables,fishing,fisherman,cutter,boat navigation,wind,chart,navigator,powerboat,sailboat,sailing,opinion The World's Premiere Source for United States Coast Guard. Information and resources about the USCG, rules, regulations, policy, pay, jobs, forms, pay, locations, and more. auxiliary,faq,facts,manuals,boating rules,boating regulations,boating safety,,inflatable boats, scuba diving,boating magazines,travel,boats,boat talk,boaters,boats for sale,boating information,survey,yacht,cruising,cruiser,sea,ocean,tide,current,weather,marine,ships,inflatables,fishing,fisherman,cutter,boat navigation,wind,chart,navigator,powerboat,sailboat,sailing,opinion The World's Premiere Source for United States Coast Guard. Information and resources about the USCG, rules, regulations, policy, pay, jobs, forms, pay, locations, and more. auxiliary,faq,facts,manuals,boating rules,boating regulations,boating safety,inflatable boats, scuba diving,boating magazines,travel,boats,boat talk,boaters,boats for sale,boating information,survey,yacht,cruising,cruiser,sea,ocean,tide,current,weather,marine,ships,inflatables,fishing,fisherman,cutter,boat navigation,wind,chart,navigator,powerboat,sailboat,sailing,opinion The World's Premiere Source for United States Coast Guard. Information and resources about the USCG, rules, regulations, policy, pay, jobs, forms, pay, locations, and more. auxiliary,faq,facts,manuals,boating rules,boating regulations,boating safety,inflatable boats, scuba diving,boating magazines,travel,boats,boat talk,boaters,boats for sale,boating information,survey,yacht,cruising,cruiser,sea,ocean,tide,current,weather,marine,ships,inflatables,fishing,fisherman,cutter,boat navigation,wind,chart,navigator,powerboat,sailboat,sailing,opinion The World's Premiere Source for United States Coast Guard. Information and resources about the USCG, rules, regulations, policy, pay, jobs, forms, pay, locations, and more. auxiliary,faq,facts,manuals,boating rules,boating regulations,boating safety,inflatable boats, scuba diving,boating magazines,travel,boats,boat talk,boaters,boats for sale,boating information,survey,cruising,cruiser,sea,ocean,tide,current,weather,marine,ships,inflatables,fishing,fisherman,cutter,boat navigation,wind,chart,navigator,powerboat,sailboat,sailing,opinion The World's Premiere Source for United States. Information and resources about the USCG, rules, regulations, policy, pay, jobs, forms, pay, locations, and more. auxiliary,faq,facts,manuals,boating rules,boating regulations,boating safety,inflatable boats, scuba diving,boating magazines,boats,boat talk,boaters,boats for sale,boating information,survey,cruising,cruiser,sea,ocean,tide,current,weather,marine,ships,inflatables,fishing,fisherman,cutter,boat navigation,wind,chart,navigator,powerboat,sailboat,sailing,opinion
Calculate Distance using your thumb or knuckle
Last Post 12 Sep 2007 05:55 PM by XShipRider. 1 Replies.
Printer Friendly
  •  
  •  
  •  
  •  
  •  
Sort:
PrevPrev NextNext
You are not authorized to post a reply.
Author Messages
NorthcapeUser is Offline
New Member
New Member
Send Private Message
Posts:1
Northcape

--
12 Sep 2007 04:03 PM
    What is the formula or calculation basis to determine the distance off-shore a vessel might be based on the known height of an object on-shore such as a water tower or tall antenna? The USCG often uses a so-called "knuckle" height when talking to boaters when trying to locate them. It would be very handy to know, and perhaps utilize, that formula/calculation. Thanks
    XShipRiderUser is Offline
    Veteran Member
    Veteran Member
    Send Private Message
    Posts:1472
    XShipRider

    --
    12 Sep 2007 05:55 PM
    Here's an excerpt to help determine height of a flare sighting:

    * Closed Fist Method (determining distance from reporting source): A closed fist held at arm’s length with the thumb side up represents approximately 8 degrees of arc. When the bottom of the fist is aligned on the horizon relatively accurate estimates of small vertical angles can be made. If you hold your fist at arm’s length, with your thumb on top and the bottom of your fist on the horizon, was the top of the trajectory above or below the top of your fist? If the flare was sighted below the top of the fist, have the reporting source attempt to more accurately estimate the angle with the horizon.
     




    Caution: I have two brain cells. Sometimes they both work at the same time.

    <!-- Edit -->

    Last Edited : 9/12/2007 10:59:47 AM GMT

    You are not authorized to post a reply.


    Active Forums 4.3



    Military clothing, gear, insignia, baseball caps and other quality items at SoldierCity


    Disclaimer

    This web site is a privately-owned and has not been underwritten or supported by the United States Coast Guard. 
    The views and opinions posted by members do not reflect the views and opinions of the United States Coast Guard.
    This is an informational site. Welcome aboard!

    Copyright 2010 by USCG.ORG
    United States Coast Guard Forums and Information  |  Terms Of Use  |  Privacy Statement