What's your prediction for her sonar range in these conditions?

Neither was within sonar range of the Sea Hound.

I've altered course to intercept her, but we can't possibly be within sonar range before dawn, even if she sticks at fifteen knots.

"But staying just out of sonar range from the base."

If the submarine was continuing south, he was now at the edge of the frigate's active sonar range.

The Soviet force had moved beyond sonar range, their last reported course being southeast toward Andoya.

The chief pushed a button and a secondary screen displayed the predicted sonar range, generated by computer from known local water conditions.

Their direct-path sonar range was just over thirty thousand yards.

As long as they're out of sonar range, I'd say we have nothing to worry about.

Slowly the pilot closed to half that distance but the echo moved rapidly out of sonar range and disappeared.