Its a dumb joke that stuck in my head. I was qualifying as Lookout on the USS Shark and had to know light configurations and what they mean. The Quartermaster asked me questions then hit me with "red over white, over white, over white". I looked everywhere for that and went thru navigation books, etc. Finally after hours of not finding it, I went back to him and he's laughing and tells me red over white over white over white means a whorehouse on the 4th floor. That joke cost me a few hours of my life trying to lookup non-existent information...Green over white is a trawling vessel w/ nets in. Green, white, white, red is a trawler pulling nets. Green, white, white, white is a trawler shooting nets. I spent a few summers growing up on shrimp boats.
I’m not familiar w/ any that have a single red & 3 whites.
I know that variations of 2 red & 2 white vertically indicate a vessel aground.
When you were new on the shrimp boat you probably got some of the same stuff I did being a new diver on dive boats. Getting asked to go get a bucket of prop wash, go get some relative bearing grease, etc.