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Aviation History
1959
1959 - 2265.PDF
44 FLIGHT 11 SEPTEMBER 1959 --*:••'•:••.•:/,.._- 1- working pilot The IFALPA delegate speaking on point source aids to the ICAO Special Meeting, Montreal, February 1959 ...." It is a most unfortunate time to have to be fiddling with a receiver. In order to tune in this type of station, you must switch off all of your other communications or else you will never pick up the Identification. One man in the cockpit is completely concerned with just one thing: tuning in the station - pressing his hands against his ears until he can identify it. The other man takes over the entire communications guard; continuously receiving clearances stepping the ship down, and also slowing it down; at the same time he is also operating a check list; this calls for conversation between himself and the other pilot if he can finish with his station identification. It is a very poor time to be distracted and pre-occupied with tuning a facility . . . there are eight holding stacks and of these six are non- directional beacons and the other two are intersections of radials from VORs. Holding on an intersection of two radials, you will be in a pattern something like this - one minute on this leg, a one minute turn, one minute on this leg, another minute turn and you are back where you started. On your Symbolic Display you centre the needle indicating the VOR radial from the left side; the VOR on the other side has a needle that is off-set, and as you approach the intersection, the needle on the other one will come into the centre—only at that one instant do you know exactly where you are. You then punch a stop watch and start a turn, using your directional Gyro and Turn Indicator—incidentally, you must hold your altitude with consider- able precision because there are people above and below you in the stack. As soon as you leave this point both needles will be at various positions on the face of the dials and extremely difficult to interpret. As you come back into your pattern, the needle on the left should centre itself. If it does not you have wind drift, and you have a minute in which to correct it and bring it back into the centre. 'IS PICTORIAL PRESENTATION DESIRABLE?* I would say that it most definitely is. There is only one instant in this four minute pattern when you know exactly where you are, and that is only if within that minute you have been able to re-align yourself"... ... but you always know where you are with THE NAVIGATION SYSTEM FOR THE JET AGE THE DECCA NAVIGATOR COMPANY LIMITED LONDON
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