What are the two primary types of anti-submarine weapons?

The two primary types of anti-submarine weapons are torpedoes and depth charges. Torpedoes are designed to be launched from submarines, surface ships, or aircraft, and they travel underwater to strike a target. They are capable of being guided or unguided and are effective at engaging submarines at varying depths.

Depth charges, on the other hand, are explosive devices that are deployed from ships or aircraft and are designed to detonate at a specific depth underwater. They create a shockwave that can damage or destroy submarines by the force of the explosion and the subsequent underwater pressure changes.

These two weapon types are specifically developed for anti-submarine warfare, optimizing effectiveness against submerged threats, while the other options such as missiles, bombs, rockets, and grenades are not tailored for this specific purpose. They might be used in other types of combat scenarios but lack the specialized design and operational roles that torpedoes and depth charges fulfill in targeting submarines.