Ronster said:

@monroville the radio chatter which does occur is another cock up...

I pointed it out earlier....

Luke to wedge " i lost my rear gunner you'll have to take the shot"

Radio chatter luke to wedge in wedge cockpit " i'll cover you"

Luke "set your harpoon and follow me on the next pass"

How will luke cover wedge if wedge is following and he has lost rear gunner?

If luke said i'll follow you it would make sense...

Also bear in mind this is the cockpit shot where it looks as if the snowspeeder will hit a rebel running away from smoke...

Basically i called for a cut or alternate exterior shot on this but to remove i'll cover you line as then the dialogue also makes sense... Luke says i'll cover you again moments later so another good reason for the chop i felt

The rear 'gunner' is the one that fires the tow cable harpoon gun. Luke is saying he's going to cover Wedge (with his speeder's forward facing lasers that he can fire), while Wedge concentrates on tripping the ATAT. It makes perfect sense.