IRS – magnetic variation tables
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IRS – magnetic variation tables
For P-RNAV certification there is a requirement to have the” Magnetic Variation Tables “updated. Does anyone know what all is about?
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Heading is derived from the IRS on modern AC. No magnetic compass system.
IRS aligns to true north then adds local variation to display mag heading. The local variation is stored in the IRS memory somewhere and as it changes with time the variation table or map must also be updated.
IRS aligns to true north then adds local variation to display mag heading. The local variation is stored in the IRS memory somewhere and as it changes with time the variation table or map must also be updated.
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Mr. Reynolds is correct. We've just got a new software update to verify in a Northrop-Grumman (Litton) LTN-101 with 2005 Mag model. This is on the CRJ but it's the same unit & SW for majority of Airbus' AFAIK.
Inertial input is required for "coasting" (when no valid GPS solution available) for AC90-101 SAAAR ops.
Inertial input is required for "coasting" (when no valid GPS solution available) for AC90-101 SAAAR ops.
