Tbh, unmanned ship ack very close up is super sketchy. Ive seen guys just fly through it for 3 minutes with 10s of thousands bullets not able to get the guy. Its the craziest thing. But yeah, no ack shooting at all is certainly not correct.
Also you can shorten AH films ln the film viewer and clip out specific times to save. Can't do a tutorial for you, but its the section on the top right area of film viewer.