1st - Distance depend on your space laws
2nd - Type (2) defense array is Anti-Battleships which shoot Cerberus and Solaris
but Type (3) defense array is Anti-Snubs (small ships) which shoots mainly Zappers and Zappers-like guns.
Thank you, Mark.
I understood that the type 3 has to be placed a bit closer to the base, while the second may be more distant. It is? Type and another one to 1000k to 1500.
Best regards: Director General of Science, Technology and Production of BMF/Secret Valley Workshop.