Patricia pumped some water out of the forward trim tank.

She pumped water from the rear trim tank and the stern began to rise.

Patricia used the noise to cover the sound of her blowing her trim tank.

Here is what the trim tanks were used for:

To maintain balance, fuel was pumped backward into the trim tanks.

Fuel was then pumped forward into the trim tanks to compensate.

His feet rested on the supporting cross members directly over the number eleven trim tank.

He moulded the substance carefully over the tip of the number eleven trim tank.

Mercury ran from the fuel deck to the trim tanks.

The diving officer ordered a short blow on the forward trim tanks to effect the maneuver.