You misspelled the name which you put into R_NAV_data.lua, you wrote "Marinas" instead of "Marianas"
Anyway, check my example file, how the content of the actual rsbn file should be done (I didn't include ARC, just RSBN).
R_NAV_data_Marianas.txt
Don't forget to add a comma after last name inside of the Maps_Table, and then add Marianas at the end, so it should look like this:
Maps_Table = {
"Caucasus",
"Nevada",
"Normandy",
"PersianGulf",
"TheChannel",
"SinaiMap",
"Syria",
"Kola",
"GermanyCW",
"Marianas"
}