XXXX10
Posts: 702
Joined: Mon Jan 03, 2000 7:10 am

A Question Of Navigation

Mon Jan 22, 2001 5:35 pm

Please can anyone help

Does anyone know how the early jet ailiners such as 737-200 ,727, fokker f28 & 1-11 navigate apart from using radio aids, are they now etro-fitted with gps?

If so does it just provide groundspeed and track information or can it give distance and bearing to the en-route waypoints.

Thanks
 
FLY 8
Posts: 328
Joined: Sat Dec 02, 2000 5:48 am

RE: A Question Of Navigation

Mon Jan 22, 2001 6:46 pm

The early jets flew from navaid to navaid, and if the flew on an "selfmade" track they had to plot their position! Here in Europe, at least in Austria and Germany, you still have to learn plotting when you take your ATPL. On long range flights they had an IRS.
Today we don´t have an IRS but an INS!
Mainly there is the FMS (flight management system) and this gets it´s information from:
VOR
DME
IRS
INS
AHRS
GPS

So if you have any questions about something else here, just ask me! If I would explain here the whole navigation stuff I would still sit around in a few days!!

Best regards,
Benjamin!
yes i can handle that alone. - - -famous last words
 
modesto2
Posts: 2669
Joined: Sun Jul 16, 2000 3:44 am

RE: A Question Of Navigation

Tue Jan 23, 2001 1:44 pm

FLY 8, could you explain: "Today we don´t have an IRS but an INS!"... I thought the IRS is an updated version of the INS that uses laser ring gyros... The 777's use GPS with multiple IRS backup.
 
Guest

RE: A Question Of Navigation

Tue Jan 23, 2001 2:07 pm

All's I know is the IRS takes my money and needs to be stopped...
 
FLY 8
Posts: 328
Joined: Sat Dec 02, 2000 5:48 am

RE: A Question Of Navigation

Tue Jan 23, 2001 7:09 pm

Sorry, my mistake!
yes i can handle that alone. - - -famous last words
 
cdfmxtech
Posts: 1319
Joined: Wed Jul 05, 2000 11:37 am

RE: A Question Of Navigation

Fri Jan 26, 2001 6:42 am

Order of navigation used on aircraft today:

GPS
DME + DME + IRU
DME + IRU
IRU

GPS is the most accurate form used to navigate. The aircraft FMCS DOES NOT want to use Inertial Reference if it doesn't HAVE to because of its error rate.
 
Buff
Posts: 1066
Joined: Fri Mar 16, 2007 1:29 pm

RE: A Question Of Navigation

Fri Jan 26, 2001 1:25 pm

Many operators in Canada still do not have anything other than basic VOR/ADF equipment in their aircraft, including (but now defunct) my past employer's Dash 8/BAe-146 operation.

LAR navigation is a most valuable skill once acquired, and can save your a** at some inoportune time when you least expect it/most need it.

Best Regards,

Buff

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