As most of you know, back in May, 2002, the USS Dolphin, the only diesel submarine in the US inventory, experienced flooding and electrical fires at sea after ingesting 75 tons of water down her only hatch.
Now, the US Navy has spent $9 million on repairs and an additional $41 million for upgrades to the research ship, which will be going on it's first mission next month.
The upgrades included:
- An inflatable boot in the ship's entryway to stop water from flowing in should a door fail.
- A shield to keep the door from accidentally opening at sea.
- More emergency breathing units.
- Four additional pumps to "dewater" the ship in the event of flooding.
- An improved, maintenance-free battery.
- Wiring and electronics raised higher in the submarine, where they're less likely to be exposed to flooding.
- A faster, clearer radar system.