you do realise that those buzzbombs and V2s' travelled quite a distance without the benefit of any form of GPS.
Whilst your terror scenario is plausible, I refuse to live in a state of fear simply because it is plausible.
Yes,
Biggles_in_Oz, the Buzz Bomb/V2s travelled across the English channel with-out any help from GPS and arrived, on average,
within several miles of their targets. The terror efect was high all the same.
(hav'nt we covered this before?
)