How naval officers learn to speak in public

How are naval officers trained to make speeches, and how is that skill used in a modern navy?

Mostly by observing and practicing with colleagues, supported by some optional classes rather than enough formal instruction.

Naval officers largely learn public speaking by watching colleagues and practicing within the service. They observe how others address sailors, peers, and senior audiences, then adapt those examples to their own roles. Optional instruction can supplement that experience, though the skill could be taught more systematically. Standards of command communication may therefore vary even inside one navy.