An earlier live statement that the Astraea class used turbine propulsion is corrected here. The historical ships had triple-expansion engines driving two shafts. The error came from reading a naval architect's handwritten experimental-turbine idea as a description of installed machinery. An ordinary cross-check would have caught the mistake, while the speculative design remains an interesting technological what-if. Even expert notes must distinguish a historical installation from a proposal.
Notable Point · 28:39-29:56
Correcting Astraea's machinery from turbine to triple expansion
A correction from turbine to triple-expansion machinery shows why a speculative design note must be separated from the historical ship.