The bad stuff immediately sinks to the bottom and you never see it.

K-159 did not sink immediately, but was clearly in distress.

She struck a mine at 0832 hours and sank immediately.

It failed to sink immediately, which all took as an excellent sign.

Any ship or boat which tried to bring men to the attack would be sunk immediately.

Two of the boats with people in them floated off, but one immediately sank.

He sank immediately into a state not far from comatose.

Web immediately sank to the floor as he heard a creak to his left.

Meanwhile, some people already in the water climbed up the ship, as they did not expect her to sink immediately.

But that required the ability to lift one's foot off the bottom without immediately sinking.