DISSUB Ventilation | A PARADIGM SHIFT: Imagine standing at the top of a skyscraper trying to drink from a carton of juice, that’s way down below at ground level, through an extremely long straw…

The longer the straw, the harder it is to move anything through it…
And that’s the limitation of traditional submarine ventilation systems for distressed submarines (DISSUBs): Distance increases resistance.

Why Conventional Surface Extraction Sucks
❌ Vacuum systems have strict physical pressure limits
❌ Long surface hoses increase friction & reduce airflow
❌ Sea pressure compresses large hoses at depth
❌ Hose deformation reduces airflow efficiency
❌ Complex deployment in currents & harsh conditions
❌ Heavy hoses = large winches & a large deck footprint

Instead of extracting air over hundreds of meters to the surface, DRASS Submarine Ventilation System (VS) brings the ventilation system down to the distressed submarine (DISSUB) to depths of 600 msw.

Thanks to its integrated compressors, Drass VS is positioned close to the submarine—enabling controlled atmosphere renewal without internal pressure build-up.

What this means
✅ Long surface return hoses are eliminated
✅ Hoses are compact & ROV-manageable
✅ Stable, higher airflow performance
✅ Safe atmospheric pressure inside the submarine
✅ Reliable atmosphere renewal for sustained life support
✅ Reduced deck footprint & winch size

Applied physics

Operational innovation

Real impact