|Boolean values: yes or no, true or false, 1 or 0
This flag has different meanings in the various games. It is documented with projectiles being able to run out of fuel and has been introduced in Red Alert, but it appears to work this way only in Firestorm.
At least in Red Alert 3.03seems only be used for considering a projectile inaccurate (see ). Apparently it is not used for detonating projectiles in air and all projectiles should explode after 255 frames regardless of the value of this tag.
Actually works as intended, albeit only in conjunction with. If the projectile exceeds the weapon's before reaching the target, it detonates immediately.