Earlier ASW concentrated on protecting convoys and warships close to the force being defended. Cruise missiles, ballistic missiles, and other submarine-launched strike weapons now make the problem oceanic because a distant boat can threaten national territory. The resulting need for protected sea areas resembles Soviet Cold War submarine bastions. Creating such areas requires sustained spending on sensors, patrol forces, and layered denial beyond a single escort screen.
Notable Point · 1:56:09-1:57:13
From convoy protection to oceanic homeland defense
Long-range submarine weapons have expanded ASW from local convoy escort into the defense of coasts, nations, and strategic sea bastions.