This month's worldwide amateur expertise is nautical

I was wondering how long of a "piece of string" etc they could have tethered to past and future Titanic expeditions … so …

TIL "the bitter end" is to do with anchors, which max out at around 1000 feet if you're very lucky … roughly 300-500 metres which is the same max depth military submarines (allegedly) go to

It is that part of an anchor cable which is #abaft the #bitts and thus remains #inboard when a ship is riding at anchor … naval jargon is up there with the best of them, to the #BitterEnd