Beginner's question: On chart B-3 "Attacking Fighter Waves" note d) says:
Only the Top Turret or Radio Room guns may fire at this fighter (both must roll a 6 to hit), and this fighter may not be driven off by fighter cover.
To my non-native speaker ear, "both must roll" sounds ambiguous and could mean either
1. I have to fire the top turret AND radio room guns. Only if I fire both, and the roll is a 6 for each of them, it counts as a hit.
2. Any one of these guns scores a hit if I roll a 6. "both" doesn't mean that I have to fire both, it just means that the "must roll a 6 to hit" requirement applies to both guns.
Which interpretation is correct?