In this design, the d3a pilots were allowed two lives since the val explodes if you look at it wrong.
In some of the scenario designs, certain planes are sure death and to compensate for that, the designers allow a second life. In the European theatre, the ju87s are usually a 2 life mission. The first life is in the ju87 and the second is in plane of choice.
Also, ditches / crashes, etc on first take-off are allowed to re-up. This is to compensate for the carrier turning, crash to desk top after launching, the terrible hit to frame rates when 60 people launch from a base, etc.
I'm sure one of the official CMs will be along to clarify any misrepresentation that I may have made.