IJO, I agree these may not be considered the BiB by name; however, each BiB is customized to the specific needs of the client. Correct? The BiB by function appears to provide similar performance features as the LTAS aerostat. Although, the function of each is slightly different.
Like your BiB Mark I vs. BiB Mark II analogy, each is still a BiB. I think it was you who reported earlier that our BiB envelope was originally from LTAS. The BiB trailer also appears to have a lot of similar features as the LTAS aerostat. After a few modifications to improve it to client specs we had BiB Mark I, and then soon later BiB Mark II. This LTAS aerostat was not identified in this PR as the LTAS 50, LTAS 100, LTAS 200, LTAS 300, or a completely customized hybrid.
One thing that is certain is that each customer will have a different need. I think labeling each within a certain category of BiB Mark I, BiB Mark II, LTAS 50, LTAS 100, LTAS 200, or LTAS 300 may be difficult to track unless it is explicitly expressed to us.