This track is by default Rank D/Hardest, 3 lives +20,000/70,000/70,000 extras or equivalent settings. Normal Fire only. Other settings are noted and tracked, as well.
Ships can be captured, but cannot be joined together to form a Double Ship at any time. Should this happen, the game is immediately over at that point.
Also goes by “No Doubles.” Some prefer this because “Single Ship” is a bit of a misnomer, as it could be understood to mean ‘only the first Life/Ship’ as opposed to ‘one Ship at a time.’
Galaga Group 