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Confusing FTW runway numbers

We were on a 2 to 3-mile final for Runway 16 at FTW (Meacham, Fort Worth TX) when we noticed what appeared to be a vehicle between the runway numbers. We prepared for a possible go-around until we were about 1 mile to 1/2 mile final, when we determined it was a black marking between the 1 and the 6.

In 30 years of flying I have never noticed another marking like this. Short final IFR might cause some confusion or other problems. The authorities should eliminate the black spot or paint a black square all around the numbers at both ends so there are white numbers on a black square.
__ ATP, Citation 501

A need to rethink oxygen use

As design performances improve, aircraft are being certified to fly at much higher altitudes. Of course, the OEMs are always pointing out that you can now fly higher above traffic and weather and are encouraging the practice in their sales pitches. Aircraft are now routinely certified to fly at FL450 or higher-even to FL510-and flightcrews are doing this routinely.

One little detail everybody seems to be forgetting is that, when flying above FL410, one pilot is required to use an oxygen mask. This is not being done and is in direct violation of the FARs. While wing designs are much more forgiving than they used to be, physics and human physiology do not change. Explosive or rapid decompression in the 40s is extremely dangerous. I believe there is a good reason for this FAR in place.

Remember, for Part 135 and 121 operations one pilot must wear and use oxygen above FL350. To me, this means somebody (FAA) thinks this (FL350) is the altitude where the danger probably really starts. Think about that. Part 91 operators are already being spotted 6000 ft above commercial operators on the use of oxygen. Also, note that there is a distinction in Part 121 (121.333) between small and large-cabin aircraft. Most Part 91 aircraft are small-cabin aircraft, which means they lose their air pressure much faster than a large airplane would.

Part 91 pilots are routinely flying small-cabin aircraft 10,000-16,000 ft higher than the altitude at which FAA says commercial operators have to use an oxygen mask. And yet this regulation is being casually ignored on a daily basis by virtually everyone. What I am wondering is how and when the "professional" pilot community decided the FAR could be dismissed. Another thought-what do you think of the chances for the (unaware) owners in the back with their little orange plastic oxygen masks? This might be one that the pilot community needs to rethink.
__ ATP, Citation