In all the trivia I've read about MI over the years, I've never read this.
https://www.marineinsight.com/marine-navigation/what-is-monkey-island-on-ships/
Is it a relatively new term? Did we just not know about this in 1989?
First time I heard of it was when @Huzyelled at me for not knowing it actually was the correct answer. (As you already saw. https://mixnmojo.com/behind/news/An-Unexpected-Part-of-a-Ship)