We all know that the Titanic had gross tonnage of 1,004 more than the Olympic had, as built. As we also know that gross tonnage (GT) only includes the enclosed spaces of a ship. So the question is, what spaces

A

So, my assumption here is that only the enclosure of the B-deck promenade spaces (Parisien, A la carte) actually did count into Titanic's higher GT, whereas the enclosed A-deck actually did not. Maybe because it was not fully enclosed, it did not have any wall or doors in the aft part of it. Could this assumption actually be the case?

*did*the Titanic have enclosed that the Olympic had not to count for in the raised GT?A

*naïve*assumption would be that the enclosed forward part of the A-deck plus the Café Parisien and the extended A la carte restaurant on the aft end of B-deck would sum up to these approximately 1,000. But then again, after the Olympic's refit in 1913, she got a GT even*higher*than the Titanic's, more precisely 1,017 more than the Olympic's original GT. The 1913 refit did add a Cafe Parisien and and extended A la carte on the Olympic's B-deck but she did*not*get her A-deck enclosed. (The remaining rebuilding of the Olympic in 1913 took place inside her hull and would not have counted for any change of her GT.)So, my assumption here is that only the enclosure of the B-deck promenade spaces (Parisien, A la carte) actually did count into Titanic's higher GT, whereas the enclosed A-deck actually did not. Maybe because it was not fully enclosed, it did not have any wall or doors in the aft part of it. Could this assumption actually be the case?