World 7 · Exploring the Deep · 9 min · PRO
Building a submersible
Pressure hulls
PRO · Ocean Deep
World 7: Exploring the Deep is part of PRO
The first world of Ocean Deep is free. PRO opens the other 23 lessons in 6 worlds — simulations, quizzes and all.
PRO includes
- All 60 labs — every world, every lesson
- Practice exams and certificates
$8.33/mo, billed yearly ($99.99) · or $39.99 monthly