frontier mission help

[frontier mission help]

thanks for the replies it helped. i was at first shooting at the foot of the rader instead of the dish or arm

[frontier mission help]

when the mission start, you have to destroy the radar station. How do you do that, i have tried shooting at it with manta and walrusses all to no effect. What am i doing wrong? Does it has to be done with the ships guns or do i have to roam around the island to find the solution?