When I first read this, I thought subgraded meant “fell into the water and sank” and “into subs” meant hit them/wrecked in to subs (that were near the ship at the time the aircraft sank). Insert spongebob (too much) time passing meme. Oh…

Sometimes I find Peter Explains the Joke funny. Sometimes I need it. I hope you’ve had a good day. This has been mine.