Objective: Fly the sub through 8 dive orders in the trench. No clicking your way through this one, Navigator — you're piloting it live.
Controls: Hold ▲ / ▼ (or the Arrow Keys) to rise or dive. Read the sonar clue, work out the integer or absolute-value math, then steer to that depth.
The Gate: Every order ends with a rock gate scrolling toward you. Hold your sub inside the safe gap as it passes — miss it and you'll scrape hull paint off solid rock.
Wrong-Answer Mines: Drifting mines mark other tempting-but-wrong depths. Get to the correct depth early and you'll cruise right past them untouched.
Hull Integrity: You start at 100%. Mine strikes and rock scrapes drain it. Hit 0% and it's an emergency blow to the surface — a "hull breach" in polite company.
Session Memory: This console only holds progress in active memory. Reloading the page resets the entire dive log.
Please enter your name before diving!
Dive Order 1: Reef Avoidance
Dive Log1 / 8
Hull Integrity
Score0 PTS
Sonar Ops Chatter
Loading dive order...
Current Depth-50 m
Hold ▲ / ▼ or Arrow Keys
💥
HULL BREACH
Hull Integrity hit 0%. The rockfish are laughing. Emergency ballast blow initiated.
Final Dive Score: 0 PTS
🧑✈️ Navigator: Student
Progress isn't saved — save this screen now as proof of completion for your teacher.
🐋
TRENCH FULLY CHARTED
Master Navigator Distinction Awarded — even the fish are saluting.
Outstanding navigation! You steered every dive order through its gate, reading negative-integer depths and absolute-value distances on the fly — no rock scraped, no mine unavoided (mostly).
Final Dive Score: 1000 PTS
🧑✈️ Navigator: Student
Progress isn't saved — save this screen now as official proof of mission completion for your instructor.