Originally Posted by
noullet
Good technique. Also, if an FMC was aboard, & I don't know if the CRJ-200 ER has one or not, KLEX would have been entered with rwy 22, the A/C triangle would have been centered on rwy22 (between the (II) on the ND, assuming it had an ND.
Yes it has an FMS and ND, however once in takeoff position, activation of the TOGA bars will "runway update" the FMS and is the equivalent of telling the FMS that you are on the preprogammed runway and you wish to update FMS position to that point. The addition of a GPS sensor will mitigate an incorrect update, but it will be several seconds before the GPS can correct the real aircraft position.
Translation- if you tell the FMS you're on the correct runway, and really you're not, it could be 5-10 seconds before the GPS can correct it.
The FMS in the CRJ is not a good situational awareness tool when on the airport.