by Gary R. » Mon Jan 16, 2006 12:15 am
I know it's not 100% but in some ways though it does require more attention than an FMC. An FMC is as complex or simple as the user wants it to be. If one flies it as I do, it's nothing to do the perf init and then enter a basic LNAV flight plan. I fly under ifr with commercial planes. So, when ATC gives me routing changes or altitude assignements I find it much easier to just disconnect the CMD and fly on heading hold and select my altitude hold and descents as required. Basically, that fnacy FMC isn't doing a lot more for me than a Carousel would the way I set it up. The INS on the other hand is what it is. It does one thing. But, on a long flight, if you want to be anywhere close to your target you do need to update it periodically. Even in triple mix it can wander up to 10 nm from one side of the "pond" to the other. Also, it can only hold 10 waypoints. If you have more, you have to add them and at that it would be cycled back to waypoint 1 and onwards. You don't need to worry those things with an FMC.
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