How to attack Victor III armed with Shkval?

[p7p8]

Originally Posted by somedude88

If I launch from far, the Victor outruns the ADCAPs, if I launch any closer than 12nm,, I get nailed by Shkvals.

Victor III speed is 32kts and ADCAP speed is 55 kts - its enough for attack form 8-12 nm
Shkval maximum range is around 6 nmi
Your safe distance is 7-10 nmi

Originally Posted by somedude88

There is also an issue with the layer @ 1000 ft. The victor smartly goes beneath the layer to avoid the ADCAPs. I read in the "red book" on how to change depths of the torpedoes, but it doesn't seem to work.

You should read first manual instead Red/Blue book
Just set FLOOR to maximum and depth under layer

If you use RA mod, ADCAPs can change depth of searching even after launching - read about is in weapon manual pdf.
Its:
ENABLE-PREENABLE-ENABLE
procedure.