Less dangerous, in fact, because sometimes one did sink in water.
She was sunk in deep water to create an artificial reef.
Most robots will sink in water or mud and fall through ice.
The submarines were sunk in deep water to the north west of Ireland.
I also knew you could die if your body temperature sank low enough, even in water this warm.
The prisoners were later sent back to Iran and the ship was sunk in water 240 feet deep.
The ship exploded and sank stern first in deep water.
My heart sank like a stone in deep water.
She paused enough for the thought to sink in like water into sand.
The ship sank 16 miles off the coast, in water 230 feet deep.