How about explaining " violet picture homing" to some of us impecunious oldies
The VP homing is based on an indicator which shows a deflection either left or right, you ask ATC to transmit for a '5 second homing' and turn to get the needle in the centre of the display, repeating as required.
Once in the overhead the needle goes off the scale.
You then fly an outbound QDM following the same procedure, descending as required 'for a specified time' then carry out a 'procedural turn' to achieve an inbound QDM, again on ATC broadcasts, still descending to Minimum Approach Altitude/Height, until the overhead is reached or visual for an approach and landing.
Cliff, having reviewed the above, it looks as if I was still doing your type of instrument approach in the 70s!!