Who believed Hood was unsinkable?

Did the Royal Navy believe its own publicity about an unsinkable Hood?

Public belief differed from the navy's professional assessment. Hood was a battlecruiser, and most unsinkability publicity did not originate with the Royal Navy.

Hood's public reputation should be separated from the Royal Navy's assessment of the ship. Most publicity about an unsinkable Hood did not originate with the navy. The naval assessment treated her as a battlecruiser. If the navy had wanted to advertise an exceptionally protected ship, a battleship such as Nelson or Rodney would have been a more plausible choice.