There are certainly some interesting ideas for a lore-based approach on that front, and I love the brainstorming so far! Perhaps you younglings returning to Verra simply lack the seafaring technology to reach beyond the depths...yet ;)
WOW this must have taken a lot of patience and precise planning to put together! I just recently learned about ministeck (as it's not really a huge thing here in the States), and you've given me a whole new appreciation for it! <3
Thank you for sharing this lovely creation with us!