2. If after air naval combat the Offensives player is the only player with active air and/or carrier units participating in the ground battle (there are no surviving active or inactive Reaction player air or carrier units) then the Offensives player adds +2 to the die roll for air superiority.
What qualifies as "participating in"? Are air units which are not in the BH, but attacked into the BH "participating in" the combat? Or do the units have to be physically IN the BH to qualify?
i.e. say I'm attacking Singapore. In order to qualify for the air combat bonus, does the CV Shokaku have to be IN Singapore, or merely within 3 hexes and have participated in A/N combat?