Treasure Hunt Puzzles: Under the Ocean

Ahooooy! You're an accidental pilot aboard a submarine that's sinking - fast! Solve the puzzles to take control and navigate back to land. You'll have to...
work our your position and route
convert patterns into words
solve maths sequences and codes
...and more. Then use your answers to master one final challenge. Devised by an expert on brain training, these mental gymnastics - and a friendly dolphin - will see you through! You can't skip a puzzle but there are hints to help and full answers.