When I was in the Navy, my first ship was a submarine tender. Periodically the welds on the inner hull of the subs are tested via a weird x-ray -type machine. So I guess they can"t be seen.
The reason for the question Ele was that weird engine blowup/blowout on the plane that sucked a lady almost out of the plane but she was pulled back in by other passengers. Sadly she died and after they said they suspected metal fatigue. So that means there is a "best by" date for metal and once "fatigued" you have to replace it? You can't "charge it" as you would a battery. Thank you for your reply and Happy Friday! Oh. What is a "tender". I know what a submarine is. So your ship "tended" to submarines/serviced them?
This post was edited by RosieG at April 20, 2018 4:33 AM MDT
Element 99 