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#1
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"Roy Smith" wrote: I suppose so. I always have this feeling my old CFII is sitting in the right seat, shaking his head when I don't do something "by the book." Single-pilot IFR is all about task prioritization. Take care of the important stuff, and don't waste time on the **** that doesn't matter. As long as you stay in the protected airspace, nobody cares what your holds look like, or how perfectly timed the legs are. Save the mental effort for important things like making sure your fuel planning is right, getting a good picture of the weather from flight watch so you know when to divert (and where), and briefing the approach you're about to fly. Good points, I know, but after 20 minutes of holding you've done all that and you'e really in need of something else to do! The PNS controller was doing a good job of updating aircraft on the freq. about conditions at nearby airports, but calling FW would have been a good idea. -- Dan C-172RG at BFM |
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#2
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Ask for 6 mile legs.
"Dan Luke" wrote in message ... "Roy Smith" wrote: I suppose so. I always have this feeling my old CFII is sitting in the right seat, shaking his head when I don't do something "by the book." Single-pilot IFR is all about task prioritization. Take care of the important stuff, and don't waste time on the **** that doesn't matter. As long as you stay in the protected airspace, nobody cares what your holds look like, or how perfectly timed the legs are. Save the mental effort for important things like making sure your fuel planning is right, getting a good picture of the weather from flight watch so you know when to divert (and where), and briefing the approach you're about to fly. Good points, I know, but after 20 minutes of holding you've done all that and you'e really in need of something else to do! The PNS controller was doing a good job of updating aircraft on the freq. about conditions at nearby airports, but calling FW would have been a good idea. |
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#3
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On Sun, 3 Oct 2004 10:56:11 -0500, "Dan Luke"
wrote: 30 minutes' wait only got the RVR up to 200, so I told Approach I wanted 30 more. I could see the fog becoming patchy south and west of the airport, but I still had to start considering my fuel state: I might actually have to fly 250 miles to find somewhere to land with reserves. Unlikely, but ya gotta go with it. The thought of being above a thousand square miles of 100' ceilings with low fuel is enough to make me very conservative. In the event, after about 20 minutes a C-208 came in and completed the approach and the rvr was up to 400, so I asked for vectors for another try. The next technical glitch appeared at the outer marker when the flaps refused to work until I toggled the handle a few times (at least it wasn't the landing gear!). That problem dealt with, I headed down the glide slope with more than usual concentration on keeping the needles centered; I wanted to make this one. This time I saw enough lights at DH to give me 100 more feet, and that was it: made it. Sounds alot like a hold I had several years ago at GTU in Texas. After trying the NDB approach, I went and held for an hour and ten minutes until the clouds decided to climb up enought to try again. What made matters worst, was the fact that we had around a 42 knot tail wind on the outbound leg, which made for a 15 second outbound just for a 1 min inbound. Talk about work! When I asked the controler for another shot, it sounded like he was feeling sorry for me buy the tone in his voice. He asked me to make one more round while he moved several aircraft around. Then he gave me the go ahead. It sure was a pretty site when the runway came into view. I was glad to be on the ground. I needed the break. Scott D. |
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#4
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In article , Scott D.
wrote: What made matters worst, was the fact that we had around a 42 knot tail wind on the outbound leg, which made for a 15 second outbound just for a 1 min inbound. Talk about work! In a situation like that, you can make life easier on yourself by asking for longer legs. |
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#5
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On Mon, 04 Oct 2004 07:57:31 -0400, Roy Smith wrote:
In article , Scott D. wrote: What made matters worst, was the fact that we had around a 42 knot tail wind on the outbound leg, which made for a 15 second outbound just for a 1 min inbound. Talk about work! In a situation like that, you can make life easier on yourself by asking for longer legs. You know, honestly that never really occurred to me. That was about the first real hold that I ever had to do in about 5 years of flying so my first thought was, am I actually doing this correctly Butthat is something to think about if I ever had to do that again. Today, I was stuck at SAF waiting for the fog to burn off because we had some avionic/electrical issues on the plane I was flying and I told my boss that I was not going to fly out of their IFR with some known issues and that we were going to wait till it went VFR, but in the mean time, We were out on the flight line when we heard a jet going missed, we could hear him but could not see him. Then about an hour later here he came and went again. I knew his pain and felt sorry for him. Then about another hour later, the fog had lifted enough and he was able to set it on the ground. It was a Challenger. I talked to the pilot and asked him how long he had held and he said that was the longest 2 hours he had ever lived. He said he had enough fuel for 1 more hour but he didn't thing that "HE" would have made it. Scott D. |
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#6
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Dan Luke wrote:
Yesterday, for the first time since I got the instrument rating 5 years ago, I had to hold for real. It was a reposition flight from Mobile Downtown to Pensacola to pick up an Angel Flight. When I checked the weather at home at 6am, fog was reported everywhere on the central Gulf Coast - the nearest legal alternate I found was Birmingham. Mobile was below minimums, but PNS was just at minimums and forecast to improve slightly. When I took off, BFM was still below minimums for the ILS, and when I checked the PNS ATIS it was 1/4, indefinite ceiling 100. Did you consider postponing the flight until PNS was reporting weather that you would need to complete the approach? According to my calculations, this was only a 46 mile flight, so it wouldn't have delayed your arrival at PNS by much, and would have saved you a bunch of fuel used in holding, not to mention the risk exposure of being airborne with nowhere to land. snip That problem dealt with, I headed down the glide slope with more than usual concentration on keeping the needles centered; I wanted to make this one. This time I saw enough lights at DH to give me 100 more feet, and that was it: made it. .... and you also had the required flight visibility? snip -- Dave Butler, software engineer 919-392-4367 |
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#7
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"Dave Butler" wrote: Did you consider postponing the flight until PNS was reporting weather that you would need to complete the approach? According to my calculations, this was only a 46 mile flight, so it wouldn't have delayed your arrival at PNS by much, and would have saved you a bunch of fuel used in holding, ... Good question. Yes, I did consider it, but at the time I took off, my information was that PNS was at minimums with improvement forecast. I wanted to get the first leg of the Angel Flight started on time if possible, because there were other people - next leg pilot, patient's relatives, etc. - waiting on the flight. ...not to mention the risk exposure of being airborne with nowhere to land Well, the airplane has 6+ hours endurance at max range power, so I wasn't _too_ worried. This time I saw enough lights at DH to give me 100 more feet, and that was it: made it. ... and you also had the required flight visibility? To be honest, I must say I did not count how many markings I could see down the runway. I was spring-loaded for another miss if it didn't look good to me. At DH I had the threshold lights; 100' lower, it looked to me like I had plenty of vis. This was not the first ILS I ever flew to minimums but it was the first one where I _really_ needed the extra 100' to get in. It was a very rapid transition from total whiteout to not-so-bad. -- Dan C172RG at BFM |
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#8
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This time I saw enough lights at DH to give me 100 more feet, and that was
it: made it. ... and you also had the required flight visibility? To be honest, I must say I did not count how many markings I could see down the runway. I was spring-loaded for another miss if it didn't look good to me. At DH I had the threshold lights; 100' lower, it looked to me like I had plenty of vis. On a standard ILS, at DH on the glide slope you're 3000 feet from the threshold, so (though slant visibility is not quite the same as forward visibility) you probably had the required 1/2 mile vis. A lot of pilots don't understand that the rule about going down to 100' on the approach lights doesn't remove the visibility requirement. If you see only a few approach lights at DH, you almost certainly do not have the required visibility, and should go missed. |
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#9
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"Barry" wrote
A lot of pilots don't understand that the rule about going down to 100' on the approach lights doesn't remove the visibility requirement. If you see only a few approach lights at DH, you almost certainly do not have the required visibility, and should go missed. I don't agree with that at all. As you mentioned above, slant visibility is not at all the same as ground visibility. If it were, I would agree. However, in my experience slant visibility is almost always much worse than ground visibility (RVR) with the sole exception being ground fog. At Pensacola, the minimum RVR is 2400 ft. I've seen it as low as 1800 ft for Cat I approaches. From 200' and assuming no displaced threshold and a typical TCH of 50 ft (as is the case for PNS) it's just under 2900 ft from airplane at DH (200 ft) to threshold. So of course if you can see the threshold, you have vis - but if you can't, that doesn't necessarily mean you don't. If you see just a few lights from 200 ft, that can mean different things. Sometimes it means that ground visibility is below mins, and then you do need to miss. However, more often (at least in my experience) it means that the VERTICAL visibility is poor - meaning you can see fine from 100 ft or so, but can't see much of anything from 200. I've personally experienced approaches where at 200 ft I could see just a few lights, but at 100 ft I could see halfway down that (6000+ ft) runway. Granted most of my IFR experience is limited to the Gulf Coast, but on the Gulf Coast this situation is VERY common - and very short lived. Give it an hour, and it almost always clears to VFR. Michael |
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#10
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As you mentioned above, slant visibility is not at all the same as
ground visibility. If it were, I would agree. However, in my experience slant visibility is almost always much worse than ground visibility (RVR) with the sole exception being ground fog. If you see just a few lights from 200 ft, that can mean different things. Sometimes it means that ground visibility is below mins, and then you do need to miss. However, more often (at least in my experience) it means that the VERTICAL visibility is poor - meaning you can see fine from 100 ft or so, but can't see much of anything from 200. I've personally experienced approaches where at 200 ft I could see just a few lights, but at 100 ft I could see halfway down that (6000+ ft) runway. But as I replied to Dan Luke, neither the visibility at 100' nor the ground visibility can replace the requirement for flight visibility to continue the approach below DH. I've always interpreted 91.175(c)(2) to mean that you must have the required visibility at all times below DH. Is there a reference that contradicts this? In the case you describe, you almost certainly do not have the required forward visibility at all points along your path. One exception I can think of would be near the edge of a sloping cloud, but this must be rare. |
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