jet Penetration...watching the film closely shows the rear tandem landing gear is down while the front is still retracted...this is used as a speedbrake. the B47 was notoriously ''clean''.
so, you overhead the airport, make a big teardrop turn to intercept the ILS, oh and lose3 10 or 20 thousand feet in the meantime at idle thrust. fuel efficent with minimum of navaids.
I've seen penetrations published on jep plates...but from some time ago.
lots of things have changed over the years...anyone remember:
triangular patterns?
airway markers
DME Arcs
vor displays with colors
PTATEN
yup...oh, and VOR based RNAV?