Complex sentence: The Kojien, on the other hand, renders "じょ" as "尉", meaning "captain" or "old man"-likening the phenomenon to an old man throwing stones into the sea.
Split into simpler sentences: The Kojien, on the other hand, renders "じょ" as "尉", meaning "captain" or "old man". The "stone-throwing old man" (石投尉) is likened to an old man throwing stones into the sea.