Often used in crime-related contexts, such as police searches.

Law Enforcement

Implies a broad and thorough search, not just a small, targeted effort.

Wide Scope

Associated with a sense of urgency and importance, often involving danger.

Sense of Urgency

Specifically refers to a method of fishing using a dragged net.

Fishing Technique

Dragnets can be controversial due to their environmental impact on sea life.

Environmental Impact

Dragnets are designed to catch a large quantity of fish at once.

Large Haul

 of that dragnet surveillance advancing any safety -- didn't identify or stop a single terrorist attack. You know what that information was useful for, though? Helping NSA employees spy on their romantic interests.