Current Manipulation Spell

The Current Manipulation Spell (海流操作魔術) is a magic spell that allows for the user to manipulate water currents for high speed swimming.

Principles
Apparently passed down by, it was a high-speed swimming spell that allowed a human to swim around the world in only three days. With simple calculation, the spell boasts a speed of 555.6 kilometers (300 knots) per hour. It is casted on the user's body. It was used by the Knights of England to allow them to swim from England to Japan, apparently non-stop. The spell also allows the user not to drown if they have fainted.

Because of its religious origins, it can be assumed that even members of the Anglican Church can use it as well.

Orsola Aquinas Rescue Arc
It is used by the Knights of England to swim from England, pass the Cape of Good Hope, South Africa, acroos the Indian Ocean, and into Japan.

They are later defeated by Kanzaki Kaori, and despite falling unconscious, she has no worry about them drowning due to the spell.