Rev 17:1

1 One of the seven angels who had the seven bowls came and spoke with me, saying, “Come here. I will show you the judgment of the great prostitute who sits on many waters, 

one of the angels – this Chapter is thematically distinguished from Chapter 18 by the angels who appear in verse 1 of each Chapter. Although these two Chapters are closely related, they have separate “messages.”

who sits on many waters – by the late 15th and early 16th centuries, European missionaries and explorers had spread the teachings of the beast across the many waters of the earth, to the Americas, Asia, Africa and Oceania.