If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
Terminology of New WAAS, VNAV, LPV approach types
"Richard Kaplan" wrote in message news:0649e5cf70eaff69b32e0896c22e491f@TeraNews... There was an intresting talk at Oshkosh about the WAAS system by one of the members of the UPSAT engineering team. As an aside, he defensively mentioned that the CNX-80 would be certified for precision approaches in "fourth quarter 2003." The sales rep on the floor were more confident that certification would occur in October 2003. Who knows what exactly to believe. Perhaps more interestingly, he showed approach plates for under-development WAAS LPV approaches to Gaithersburg, MD and Red Wing, MN with minimums of 250 - 3/4. Those approch plates had separate minimums listed for LPV, VNAV/LNAV, LNAV, and circling approaches. He indicated that currently the CNX-80 can only fly an approach down to LNAV minimums but ultimately it will meet LPV minimums. However, when flying the LPV approach if the WAAS system should be flagged as inoperative then the pilot could instead fly to VNAV/LNAV minimums. He indicated that current-generation non-WAAS receivers are not approved to fly the precision VNAV/LNAV approaches yet the WAAS-approved CNX-80 will be approved to fly VNAV/LNAV approaches with WAAS inoperative. The AIM is somewhat ambiguous on this topic, implying that VNAV/LNAV is separate from the WAAS system but requires accuracy equivalent to barometric altimetry. I am not sure what to make of this, and I suspect there will be an important learning curve when these approaches and these GPS receivers become more common. Any further thoughts? This way you get something for all those WAAS development dollars. |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
The perfect approach | Capt.Doug | Home Built | 25 | December 3rd 04 03:37 AM |
IR checkride story! | Guy Elden Jr. | Instrument Flight Rules | 16 | August 1st 03 09:03 PM |
Big News -- WAAS GPS is Operational for IFR | Lockheed employee | Instrument Flight Rules | 87 | July 30th 03 02:08 AM |
CAT II Minimums on a CAT I Approach | Giwi | Instrument Flight Rules | 11 | July 24th 03 07:46 AM |
Garmin Behind the Curve on WAAS GPS VNAV Approaches | Richard Kaplan | Instrument Flight Rules | 24 | July 18th 03 01:43 PM |