Shots of a passenger ferry going through intense waves are totally real

Australia's Sydney Harbour is far from what you'd call the high seas.
But recent windy weather has led to some rocky trips on the Manly passenger ferry, which have also led to some amazing photographs of the challenging waves faced by these commuter boats on Saturday.
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Captured by photographer Haig Gilchrist, one particular picture of waves rising higher than the ferry's short railings looks utterly te