Originally Posted by
Old Carthusian
The Red Herrings become a shoal. Direct v Indirect input now.
No.
It's not Direct or Indirect Input.
It is perhaps too abstract, and a terminology that is not part of your profession.
It is Direct versus Indirect Information Transfer.
If B is interested in information about A, it can have a Direct information exchange from A to B, which is not altered by any intermediate agent.
An Indirect information exchange involves one or more intermediate agents - let's say C, D, E, F, G. Each intermediate agents transform, translate, or process the information as part of the transfer. C, D, E, F, and G transforming, translating, or processing, is introducing distortions, and errors. Consequently, when the information arrives to B from A, via C, D, E, F, and G, it can be distorted or altered significantly.
Originally Posted by
Old Carthusian
... Instruments, AirTren, instruments are the key.
They are not fooled by panic, tension, stress or any of the other factors which so much mess up human perception.
No.
The KEY is the visual contact, the visual perception.
In case of a blinding attack, the instruments are not good at anything.
The panic, tension, stress, are affecting the visual perception.
Instruments can be inaccurate, can be fooled. They show data collected by sensors, processed by sensor data processing units, and as such they can be fooled by malfunction of sensors, by margin of errors in the processing algorithms, etc... This was the case with the AF447 out of specs AOA.
See also Machinbird's post.
They can be relied on to give an accurate reading of a situation provided you remember your training and cockpit drills. No need to look at the yoke or whatever, look at your instruments.
You're missing the point, you're missing the difference between Direct and Indirect Information Transfer.
The direct visual contact of the PNF with the PF's SS, yoke, or whatever other control mechanism is in the cockpit, is a Direct Information Transfer - from A (SS of PF) to B (PNF).
The reading of instruments, is Indirect Information Transfer - from A to B, via C, D, E, F, G etc.... , because, the instruments don't show directly the PF actions on the SS, but rather the effects of the PF's SS actions onto the deflective surfaces, along with effects onto the A/C attitude, A/C speed, etc,... (which combine other controls, like throttle, trim, etc...) Information about those effects is collected by the A/C sensors, each sensor with its margin of errors, and passed to the sensor data processing units, and so on, (with each sensor data processing algorithm having its own margin of errors).....
Finally, the PNF reading the instruments need to make a mental translation of the instrument readings into PF SS actions. For accuracy,
the PNF need to exclude the effects of the PF actions on Throttle, or trim, or others... That is in fact impossible....
As you can see - if you're willing to - the Indirect Information Transfer is not only so convoluted, that by now, we've probably forgot that the PNF was just interested in the PF's actions onto the SS,.... but it is introducing the effects of other controls than the SS, which is impossible to determine only from a reading of the instruments......
