The captain ordered the submarine to remain above its operating depth to reduce the risk of hull damage during the engagement.

Before the final sea trials, the captain briefed the crew on the submarine's test depth and emergency procedures.

Engineers compared the crush depths of the prototype hulls to ensure safety margins.

Before finalizing the report, the team compared the test depths recorded across all sites to identify anomalies.

The engineers compared the design depths across several prototypes to ensure adequate safety margins.

The corvette depth charged the suspected submarine until it surfaced.

The destroyer was depth-charging the suspected submarine throughout the night.

The frigate depth-charges the suspected submarine every time it detects a faint ping.

The destroyer spent the night depth charging suspected enemy submarines.

During the night patrol, the destroyer depth-charged the suspected submarine, forcing it to surface.