Why ASW rockets suit the Baltic

Why does Sweden use anti-submarine rockets in the Baltic?

Because shallow water makes rocket-delivered depth charges practical and effective.

The Baltic's shallow operating environment lets a rocket throw a depth charge to useful range without requiring an elaborate guidance system. Once the charge enters a constrained water column near the submarine, a simple explosive pattern can still be effective. Similar logic applies in shallow parts of the Mediterranean, and Russian forces continue to use related rocket ASW weapons. This environmental fit keeps an older, mechanically simple weapon useful where depth limits the target's room to evade.