Titanic or Olympic?
https://theunredacted.com/titanic-conspiracy-the-ship-that-never-sank/
https://www.history.com/news/5-things-you-may-not-know-about-titanics-rescue-ship
"while serving as chief officer on Campania in 1907, Rostron claimed to have sighted a sea serpent, which he later wrote about in detail in his memoir “Home from the Sea.†"
Ha, remember on the other gab site when the stranded U-boat crew were captured and claimed their sub had been disabled by a sea creature?
I hadn't heard of the ship switching and there are some odd coincidences there, but.....
The Californian had nothing but survival blankets for cargo? That's odd because in the movies (my only source, I'm man enough to admit) the Californian was doing anything but being on standby to rescue the sinking Titanic. They had in fact, missed receiving the first SOS calls and they had also switched off their telegraph connection (because it was beddy-by time) just minutes after the Titanic started to sink.
Didn't the Captain and crew in the Titanic go down with the ship? If so, then they were giving their company total dedication and service because if it wasn't them that rammed the "Olympic" into the iceberg, then who did?
Finally, I don't think that four or five people could have the time to repaint the ship names and switch all of the named items (thousands of plates, napkins, name plates in rooms, etc) in two gigantic passenger liners without notice. I say four or five people because it would take that few people to keep such a thing a secret, even back in 1918. Those sister ships were big and I think a large crew of switcherwooers would have been needed to accomplish the task. Though nowhere has anybody come across a diary from Aunt Jane or a journal from Uncle Charly that shows they were part of a secret ploy to switch ships. People are people and there are always a few who can't resist leaving a record that they played a part in some type of nefarious plot.
But, in the immortal words of Fats Waller: "One never knows, do one?"