Even a ‘experimental’ aircraft or a ‘homemade’ automobile will require some type of certification by an authority...................
I think old-time submariners pounded metal on metal with tools agaianst steel hulls to make signal noises. How would that work with a carbon fiber hull? Could they find heavy enough metal object to clang together to bea heard outside the ship by potential rescuers?
And why on Earth would they apparently not have an ocean locator beacon or transmitter to turn on to aid in rescue, like the Epirbs that boaters can and should buy? Water activated and auto matic. SMH....
“Even a ‘experimental’ aircraft or a ‘homemade’ automobile will require some type of certification by an authority...................”
Only if it is operated in the enforcing jurisdiction.
Really? Who has the authority to issue certification not in their own airspace or national waters?
The home brew automobile that a buncha farm kids cobbled together needs no busybody official certification if it never leaves the ranch.