As Underway has pointed out before, they slow down in terminal, so they can acquire and correct. I would likely not waste a SM3 or SM6 on those. That's what we have all those lovely ESSM's in quad packs for. All that is after electronic effects has been expanded, and you still have oft kill after that.
You also have to have politicians with the Kahuna to kill a surface ship way out on the high seas. You'd better be at war first, and know which country's warship that is.
Perhaps there are alternate opinions on the utility of the ESSM in the ABM mode?
would essm be an effective counter to an incoming ballistic missile +4
The Evolved SeaSparrow Missile (ESSM) is generally not considered an effective or primary counter against incoming ballistic missiles, particularly high-speed or long-range threats, as it is designed for point-defense against sea-skimming cruise missiles and aircraft.
While the ESSM Block 2 possesses high maneuverability and speed (over Mach 4), it has significant limitations regarding ballistic missile defense (BMD):
Designed Role: ESSM is a medium-range, ship-launched missile tailored for fast, low-altitude maneuvering targets, such as anti-ship cruise missiles (ASCM).Limitation vs. Ballistic Targets: It is not designed to defeat hypersonic or ballistic missiles, which have different, often much higher, trajectories and kinetic energies.
Specialized Interceptors Required: Ballistic missile defense, specifically in the terminal phase, typically requires specialized, higher-velocity interceptors such as the SM-3 or SM-6
Exceptions and Nuance:
Terminal Defense: In a scenario where a lower-tier ballistic missile is already in its final, terminal descent, some observers debate the theoretical possibility of a lucky intercept, but it is not its intended mission.
Block 2 Upgrades: The ESSM Block 2 features active radar homing, increasing its agility and capability against complex, high-speed targets compared to Block 1, but it is still limited by its small warhead and range compared to SM-series missiles.
In the US Navy and allied fleets, ESSM operates as a, layered defense backup, complementing the long-range capabilities of the SM-2 and SM-6.