This seems to be the first approach to the modern ballast tank.

The differences can especially be seen in empty ballast tanks.

Once that's done she can blow the ballast tanks and stay on the surface.

The only other choice is filling ballast tanks with oxygen.

She was able to surface by means of an emergency ballast tank blow.

The space between the double-hull is used for ballast tanks.

At that moment, the ballast tanks flooded without any apparent reason.

Main ballast tanks are in pairs; one on each side of the boat.

Based on other reported issues, there many also have been problems with the air lines supplying the ballast tank.

They go into an air vent which leads to the ballast tanks.

But actually, most of the oil from those two tanks had leaked into the ballast tank.

The only chance of stopping that was to blow the main ballast tanks.

It calls for building ships with ballast tanks all the way down each side, as a kind of bumper.

Explosive charges will blow off all the ballast tanks, and up we go.

The forward ballast tank could not be dumped faster than the rear.

The ballast tanks drank in water when the valves were opened.

It was later found that he also had the ballast tank filled with barley.

There were three ballast tanks, one in the centre and one either end.

Furthermore the main ballast tanks could be blown from either end of the ship.

Over 12 hours or so, these openings let water flood such larger areas as ballast tanks.

"Just that little point about the intake valves and the ballast tanks."

More rumbling from below as water poured out of me ballast tanks.

These ballast tanks are connected to pumps which can pump water in or out.

Air hissed loudly out of the ballast tanks, and that was it.

In that situation the only course was to blow out the ballast tanks immediately with compressed air.