I didn't say clock skew. I said drift. As in, you lose GPS timing signals so your own internal master clock freewheels. That has nothing to do with clock skew (

I didn't say clock skew. I said drift. As in, you lose GPS timing signals so your own internal master clock freewheels. That has nothing to do with clock skew (different components within the jet 'seeing' different time due to delays or other issues). The jets are designed to function with degraded or no GPS functionality. But, if it's there, they will take full advantage of it.