Notices

LORAN / GPS

Old 06-28-2006, 09:55 AM
  #1  
Junior Member
Thread Starter
 
Join Date: Apr 2005
Location: GRAND BAY ,AL
Posts: 23
Default LORAN / GPS

I HAVE SOME LORAN NUMBERS AND WHEN I PUNC THEM INTO THE CONVERTOR PROGRAM IT COMES OUT WITH LAT / LON NUMBERS WEIRD LOOKING. FOR EXAMPLE: IF I TYPE IN THE LORAN NUMBER FOR THE SOUTHWEST ROCK OF 12655.4- 47050.4 IT GIVES ME A GPS COORDINATE OF 3O 06'08.072" N - 88 12'16.998"W. THE CHART GIVES A GPS COORDINATE OF 30 06.414N - 88 12.275W. I KNOW THE CONVERSION WONT GET ME RIGHT ON THE MONEY BUT I WAS WONDERING WHY IT GIVES SO MANY NUMBERS FOR THE GPS COORDINATES? SO I GUESS MY QUESTION IS HOW DO I TYPE THIS (3O 06'08.072" N - 88 12'16.998"W) INTO THE GPS THAT ONLY HAS ENOUGH SPACE FOR THIS (30 06.414N - 88 12.275W). THANKS FOR YOUR HELP! :D
BOBBY C is offline  
Old 06-28-2006, 10:09 AM
  #2  
Senior Member
 
Join Date: Jul 2004
Location: Gulf of Mexico,Louisiana
Posts: 6,289
Default Re: LORAN / GPS

All you need to do is put in the numbers as: 30 06 08N 88 12 16W.Now,when you get to the spot,if say you are fishing a reef or coming into a pass,you can change that number as needed by using your sounder for the reef or channel.
prockvoan is offline  
Old 06-28-2006, 11:19 AM
  #3  
Senior MemberCaptains Club Member
 
Join Date: Dec 2002
Location: South Jersey
Posts: 391
Default Re: LORAN / GPS

What you are seeing here is actually different displays of the same lat/lon information. There are different formats for lat/lon, with the 2 most common being dd mm ss and dd mm.mmm where dd = degrees, mm = minutes and ss = seconds. With lat/lon, there are 60 seconds in 1 minute and 60 minutes in one degree. The display of 3O 06'08.072" N would be read as "30 degrees, 6 minutes and 8.072 seconds north latitude". The display 30 06.414N would be read as "30 degrees 6.414 minutes north latitude". So the real conversion you need to consider here is the conversion of the display of minutes (including decimal places) to/from minutes and seconds. To go from minutes/seconds to minutes with decimal, divide the number of seconds by 60. To go from minutes with decimal, multply the decimal part of the minute by 60. Doing so would yield the following -
3O 06'08.072" = 30 06.135'
88 12'16.998" = 88 12.283'

When you convert the seconds to minutes, you can see they are close (better on the lon than the lat in this case), a little over 1/4 mile apart. Which is about what you would expect for the conversion of loran to gps.

Your specific gps unit should have the ability to change the display for the lat/lon from dd mm.mmm to dd mm ss and vice versa depending on what you need.
captadamnj is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


Thread Tools
Search this Thread