Whether it's light reflection, ultrasound, particle-sensing radar, or material scanner, all are restricted by the complex and adverse geographical environment of the obstacle zone. Long-range spectral analysis and optical telescopes are similarly useless. And the particle storms, electromagnetic chaos, and gravitational reefs frequently appearing inside the obstacle zone are nightmares for all electronic systems of the battleships.
Including electronic attack systems, ship control systems, coordination systems, communications systems, command systems.... the higher the degree of electronicization, the harsher the blow it suffers. Here, the most reliable and safest solutions are the simplest and most primitive mechanisms.
Imagine a fleet entering an obstacle zone surrounded by asteroids and various harsh environments, ambushed by an enemy fleet occupying favorable terrain, it would be such a tragic situation.
