You would use anfo for underwater demolition? How does moisture affect ammonium nitrate?
What type of booster would you use?
The outer pipe line is encased in concrete. How would magnets work under water on concrete?
Why not ANFO? Moisture is irrelevant if you have a sealed container.
Magnets work just fine underwater. The pipeline is steel with a concrete shell.
Why are you so hellbent on making the technical problem more difficult than it really is?
