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March 8th, 2006, 23:25
| #1 |
| Senior Member  Join Date: Feb 2006 Location: KSTL
Posts: 500
 |  VDP's
just want to clarify about VDP's can you descend prior to the VDP if you have the runway insight? the comm/inst Jepp book says you shouldn't
__________________ Tim |
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March 8th, 2006, 23:30
| #2 |
| Old Skool  Join Date: Apr 2003 Location: Atlanta
Posts: 2,205
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I dont think you are suppose to descend until reaching VDP because of potential hazards. If you can see the runway then are visual and the VDP doesnt really come into effect.
__________________ Once you have tasted flight, you will forever walk the earth with your eyes turn skyward, for there you have been, and there you will always long to return.----- Leonardo Da Vinci |
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March 8th, 2006, 23:31
| #3 |
| Old Skool Join Date: Dec 2002 Location: ??
Posts: 4,600
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Why would you want to?
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March 8th, 2006, 23:36
| #4 |
| Senior Member Join Date: Feb 2006 Location: KSTL
Posts: 500
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thanks for replying i was just reading and just thought i'd ask, haven't done many approaches with VDP's Why would you want to? well, I probably wouldn't, seeing as I'd already be down low at the MDA... 
__________________ Tim |
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March 8th, 2006, 23:43
| #5 | |
| Old Skool Join Date: Dec 2005 Location: Winchestertonfieldville
Posts: 6,802
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__________________ The simplest answer tends to be correct. | |
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March 8th, 2006, 23:44
| #6 | |
| Old Skool Join Date: Dec 2002 Location: ??
Posts: 4,600
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After you cross the VDP, if you don't have the runway in sight, you might as well plan on going missed. Once you've passed it, landing in the touchdown zone using "normal maneuvers" becomes less likely, although that somewhat depends on aircraft type and whether you're 91 or 121/135.
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March 8th, 2006, 23:54
| #7 |
| Old Skool  Join Date: Jul 2003
Posts: 2,523
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A time when you might want to ignore the VDP is if you are in a light airplane and have a very, very long runway. Since you are part 91 and don't have to land in the touchdown zone, you can keep going to the MAP at the MDA and maybe you'll get the runway in sight when you're almost of the end of it. If it's 12,000 feet long then you'd easily be able to get down from an MDA that's 400 to 600 AGL.
__________________ Even those who arrange and design shrubberies are under considerable economic stress in this period in history. |
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March 8th, 2006, 23:58
| #8 |
| Senior Member Join Date: Feb 2006 Location: KSTL
Posts: 500
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you are absolutely right. if youre that close to the runway but don't see it, no point in really continuing. Reading more in depth in the AIM, it states that to descend below MDA at the VDP one must have the visual reference required by 91.175(c)(3).
__________________ Tim |
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March 9th, 2006, 12:01
| #9 | |
| Old Skool  Join Date: Mar 2001 Location: NC
Posts: 2,332
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March 9th, 2006, 12:26
| #10 |
| Senior Member  Join Date: Oct 2003 Location: Gilbert, AZ
Posts: 1,170
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Do you mean in the sim, or in reality? 
__________________ "To be old and wise you must first be young and stupid." - Anon |
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March 9th, 2006, 12:27
| #11 |
| Old Skool  Join Date: Aug 2003 Location: Frigid NWA Hub
Posts: 1,885
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If you are flying something fast you might actually start the action of beginning a descent at the Precision Descent Point in order for the aircraft to physically be descending at the Visual Descent Point. 
__________________ "I'd rather screw my way around the country then blow my way around..." - Saab 340 Driver |
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March 9th, 2006, 17:19
| #12 |
| Old Skool  Join Date: Sep 2003
Posts: 1,943
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I believe Part 121 says you can descend below a VDP if delayed descent will make it impossible to land in the touchdown zone.
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