La ce mai sunt folosite submarinele in ziua de astazi?

Coast Guard Intercepting Submarine Carrying $181 Million In Drugs
The Coast Guard Cutter Stratton crew seizes bales from a self-propelled semi-submersible submarine interdicted in international waters off the coast of Central America, July 19, 2015. The Coast Guard recovered more than 6 tons of drugs from the 40-foot vessel. Video by 94th Airlift Wing

Pai printre altele, la contrabanda cu droguri. Spre exemplu poti sa transporti pe sub apa, pe sub nasul Garzii de Coasta, vreo sase tone de droguri cu valoarea pietei de ~ 180 milioane de dolari. Asta in teorie, ca in practica….