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marcon8122

How to insert NATS in 747 FMC ?

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I'm using real flight database route and i'm not able to insert NATS points in FMC for Example N5300 W0200 etc How can i do it ?Thanks


Marco Negri

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Parse it NXXEXXX. So todays Track A would be,A ERAKA N60W020 N61W030 N61W040 N60W050 N59W060 LAKES


Eric Vander

Pilot and Controller Boston Virtual ATC

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It is easy to forget and many different aircraft do it differently. A trick I have learned when trying to figure it out is go to a page in the FMC where lat and lon are shown. Copy the format that the FMC shows when inputting them and you will almost always get it right.


Branton Turner

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N latitude, W < 100 degrees longitude = xxxxN(eg: 6040N = 60N 40W)N latitude, W > 100 degrees longitude = xxNxx(eg: 50N20 = 50N 120W)N latitude, E < 100 degrees longitude = xxxxE(eg: 4507E = 45N 07E)N latitude, E > 100 degrees longitude = xxExx(eg: 12E21 = 12N 121E)S latitude , W < 100 degrees longitude = xxxxW(eg: 1041W = 10S 41W)S latitude, W > 100 degrees longitude = xxWxx(eg: 05W60 = 05S 160W)S latitude, E < 100 degrees longitude = xxxxS(eg: 0233S = 02S 33E)S latitude, E > 100 degrees longitude = xxSxx(eg: 14S11 = 14S 111E)It's fairly simple to remember.It's either a North latitude or a South latitude, paired with West or East longitudes; NW, NE, SW, SE.If the West/East is greater > 100 degrees, the letter modifier will always be in the middle of the fix (xxNxx)If the West/East is less < 100 degrees, the letter modifier will always be at the end of the fix (xxxxN)North lat + West long = N as the modifier letter ( xxxxN / xxNxx )North lat + East long = E as the modifier letter ( xxxxE / xxExx )South lat + West long = W as the modifier letter ( xxxxW / xxWxx )South lat + East long = S as the modifier letter ( xxxxS / xxSxx )pacific_atlantic_fix_logic.png


AJ Pongress

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Parse it NXXEXXX. So todays Track A would be,A ERAKA N60W020 N61W030 N61W040 N60W050 N59W060 LAKES
Nice writeup AJ, but parsing like this doesn't have any of the restrictions as yours. It is the latitude modifier (N or S) followed by the two digit latitude identifier. Then the longitude identifier plus the three digit longitude (include a zero for lon<100)

Eric Vander

Pilot and Controller Boston Virtual ATC

KATL - The plural form of cow.

KORD - Something you put in a power socket.

UNIT - Something of measure

My 747 Fuel Calculator

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but parsing like this doesn't have any of the restrictions as yours. It is the latitude modifier (N or S) followed by the two digit latitude identifier. Then the longitude identifier plus the three digit longitude (include a zero for lon<100)
Agreed,A misplaced digit or letter can create a LATLON WPT thousands of NM off your planned track. Oceanic coordinates are actually very easy to enter, but this must be done in the correct format via the LEGS Page in the PMDG aircraft. It's good practice to learn how to enter/construct the RTE using the RTE Page & LEGS Page in addition to learning how to enter LAT LON WPT entries in the various formats (You never know when you might get a track change on the NATs during an online event if you fly online). RTE 2 is often a copy of RTE 1, an alternative approach might be loaded into RTE 2 in the event of a late RWY change on the arrival. PMDG product manual pp353 but...3 ways to input a LATLON into the 744 FMS:There is a method that codes the LATLON into a series of numbers & letters which are held in the NAVigation DATAbase...these coded WPTS occur at standard intersections at 20, 30 , 40 , 50 & 60W on the North Atlantic routes & are also used to code LATLON intersections in other areas of the world.So, 5300N 02000W is actualy 50 degrees North & 20 degrees West, coded as 5020N...this coded WPT may be entered on the RTE Page, the following are examples: N Lat W Long - N46W050 - 4650N N Lat E Long - N50E020 - 5020E S Lat E Long - S50E020 - 5020S S Lat W Long - S52W075 - 5275W Where the longitude figure (E or W) is 3 digits: N Lat W Long - N37W125 - 37N25 N Lat E Long - N06E110 - 06E10 S Lat W Long - S20W125 - 20W25 S Lat E Long - S06E110- 06S10The majority of LATLON intersections worldwide are 'coded' in the current PMDG AIRAC Cycle available from Navigraph. As has been discussed earlier the margin for error here is large.If a coded version of the LATLON does not exist in the NAVigation DATAbase the user MUST enter the coordinates via the LEGS Page in the either of the following 2 formats:Expanded Format: N5300.0W02000.0orStandard Format: N53W020The expanded format is more often used where mins & seconds of LATitude or LONgitude are required, for example:N01030.0W010.30.0My personal preference is to enter all NAT LATLON entries in the Standard Format, or, where necessary in the Expanded Format, by doing this it is clear to the eye..useful on the North Atlantic at times of high workload when a full position report is required. Hope this helps.

Steve Bell

 

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