NavList:

   

Reply

Dear James

I would be very happy to correspond with you more on SAR procedures.
It is very interesting.  You have the DF bearings from the 121MHz
locator beacon on and EPIRB presumably, or on a VHF transmission?
Uncertainty in a casualty drifing can also be encorporated in teh same
framework and still gives an ellipse of uncertainty in the simplest
case.  My work email address is bill.lionheart@manchester.ac.uk

I just put a copy of the paper (as submitted)  on our local preprint
server http://eprints.maths.manchester.ac.uk/2725/

Which is easier than the way the JoN links, for example you can print
it. The official version has some small improvements and looks better.

Bill

On Fri, 16 Aug 2019 at 21:17, James F Campbell
 wrote:
>
> I should like to know how to obtain a copy of the subject article.
>
> I was a member of the R.I.N. for years and finally gave up membership when 
the price got to be a wee bit to high.
>
> I have an interest in the subject because I share responsibility for a 
Search and Rescue Course based on the manual method outlined in Volume 2 of 
the International Aeronautical and Maritime Search and Rescue Manual 
(IAMSAR). When a mariner in distress gives a Rescue Coordination Center (RCC) 
their position, an error factor is assigned to that positon.  That factor, 
along with others, is used in the computations that lead to developing the 
Search Area into which a Search and Rescue Unit (SRU) is deployed. A position 
based on two Radio Direction Finding (RDF) bearings is a doozy to solve; see 
appendix Q Bowditch 1977 and 1984, volume 1 and the 2017/2019 Bowditch, 
Chapter 3, volume 2. The Admiralty Manual of Navigation, Chapter 16 and 
appendices thereto, give a 'quick and dirty' error calculation. But it has 
deficiencies when contrasted to the 95% ellipse that the Bowditch formulae 
give. A three bearing solution - well that sounds very interesting (apologies 
to Arte Johnson!
>
> James F. Campbell
> Instructor
>
> U.S. National SAR School
>
> 

   

Reply