What can an NDB be co-located with
Joined: Dec 1998
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From: Escapee from Ultima Thule
DMEs were commonly co-located with NDBs in Australia. Only difference was that you needed to tune the DME separately to the ADF, unlike the slaved channel tuning of a VOR/DME pair. If it was with one of Oz' old domestic DME installations you'd set the channel in the DME box. If it's with the more modern international DME you'd tune the paired VOR frequency to get the DME to tune. If you needed to use the VOR on a different frequency then you'd select the hold function on the DME to prevent it changing channel when you retuned the VOR.
Joined: Jul 2009
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From: N 06/W 75
Not normally with a VOR - no point - but could be
By the way, low power output NDB's can be co-located with Marker Beacons on ILS systems. Those ones are called LOM or LMM or whatever. LOM: Locator Outer Marker; LMM: Locator Medium Marker.
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From: Arizona Bay
Joined: Nov 2005
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From: Norway
Well if a NDB was co-located with a TACAN, it would let civilian aircraft get more than just a DME from that TACAN... So that could have been an idea... All up to the point when they began spreading of the VOR/DME's all over.
A NDB/DME could mabye be a poor man's (or poor airports') VOR/DME but with needle and no CDI. But then, the GPS came. At least in the US it seems like remote fields typically either have ONE NDB approach to the field and one GPS approach to each of the runways...
A NDB/DME could mabye be a poor man's (or poor airports') VOR/DME but with needle and no CDI. But then, the GPS came. At least in the US it seems like remote fields typically either have ONE NDB approach to the field and one GPS approach to each of the runways...
Guest
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Greetings
Most of the time approaches use Locator and they are co located with Markers as stated by Ocampo, NDB are more associated with routes (Airways), now some airports have DNB approaches, one stone two birds, it is because NDB is needed for the route over the airport.
The consol was an NDB with 400 NM ranges, one was in Norway stavengar, one was in Malta Gozo, one in Sardegnia, they have been decommissioned, Locator has 15 NM range.
Most of the time approaches use Locator and they are co located with Markers as stated by Ocampo, NDB are more associated with routes (Airways), now some airports have DNB approaches, one stone two birds, it is because NDB is needed for the route over the airport.
The consol was an NDB with 400 NM ranges, one was in Norway stavengar, one was in Malta Gozo, one in Sardegnia, they have been decommissioned, Locator has 15 NM range.
Joined: Dec 2006
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From: Behind a CB near you
There are several NDB/DME approaches in New Zealand where the DME is co-located with the NDB. Then there are the aerodromes which have NDB, VOR and DME and more often than not the VOR is co-located with the DME but you can still conduct a published NDB/DME approach.
Joined: Jul 2009
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From: N 06/W 75
LMM-Locater Middle Marker, I believe.
We used to have many NDB approaches to small airports here. They are becoming rare nowadays, as there are VOR's replacing the NDB's. So, having no DME coupled with the NDB, we had to make timed NDB approaches.
Best regards
Ed
