Yeah, I too think it's about as good measurement/guesstimate as can be done right now. Assuming the bulkhead in the drydock is in the exact same place. Not sure its exact waterline measurement, as we should already be seeing floor of the hangar, or at most one deck below hangar level. Which could add a few meters to the bow section.
Also, for reference's sake, Forrestal carrier waterline length is 300 m.
Also, for reference's sake, Forrestal carrier waterline length is 300 m.