VR3 Dive computer is my weapon of choice.
Diving a frigate that was sunk during the Turkish occupation of Cyprus.
140m is an extreme dive but by no means my deepest, I held the world record once for a closed circuit dive at 205m.
PADI dive tables are very good safe and reliable tables don't underistimate them for no stop diving. A computer is a great tool just make sure you understand what it is telling you and why!