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Thank you.
Guy
----- Original Message -----
From: "Pierre Boucher" 
To: 
Sent: Saturday, June 24, 2006 7:47 AM
Subject: Re: I knew where we were, but where are we now?


> 40 deg 07 min N -> 40.12 (rounded)
> 44 deg 37 min W -> 44.62 (rounded) not needed
> Course 090 -> Course N 90 E
> distance traveled 56.88 Nm
>
> To find DLat (difference of latitude in minutes of latitude)
> distance traveled x cos(course) = Dlat
> 56.88 x cos 90 = 0
>
> To find DLo (difference of longitude in minutes of longitude)
> distance travel / cos(mid latitude)
> 56.88 / cos 40.12 = 74.4 = 1 deg 14.4 min (Eastward)
>
> New DR?
> New latitude
> 40 deg 07 min N + 0 = 40 deg 07 min N
> New longitude
> 44 deg 37 min W - 1 deg 14.4 min = 43 deg 22.6 min W
>
> Pierre Boucher
>
> Guy Schwartz a ?crit :
>> This has probably been discussed here before, but hopefully someone will
>> help me out. I'm trying to find the formula for caculating your DR after
>> traveling from a know position.
>> For instance:
>> Last Fix
>> 40 deg 07 min N
>> 44 deg 37 min W
>> Course 090
>> distance traveled 56.88 Nm
>> New DR?
>> It would be a big help to me if someone that knows the formula could
>> incorparate the above example so I could follow along.
>> Thank you,
>> Guy
>
>
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