I was watching some videos made by flat earthers and they made comments about how nuclear weapons and nuclear power are hoaxes. Is this a commonly held belief among flat earthers or are those people more on the fringe? The reason why I ask is I was a Submarine Officer in the US Navy (all submarines in the US Navy are Nuclear) for 9 years and I was frequently in charge of the engine room and the reactor. I am curious how flat earthers could explain how my submarine could remain submerged for months at a time without ventilating if we didn't have a nuclear reactor. What power system could move a 7,000 ton submarine at 20+ knots without oxygen? All surface ship propulsion (with exception to Nuclear Aircraft Carriers) requires oxygen to function. Other countries use batteries or AIP for their submarines but their submarines are much smaller, weight much less, are much slower and can't stay submerged as long.