[Owen]

I doubt it will work. High directivity antennas mean narrow beamwidth, in order to get the level of energy up.

Pointing them to a degree or two accuracy likely isn’t going to happen, especially if the target maneuvers. Not gonna require much mass in shielding, either.

[lightman]

Not to mention cosmic rays and solar ejections.

[Elsie]

Pointing them to a degree or two accuracy likely isn’t going to happen,

Oh?