The Sydney, 1890 is a U.S. Supreme Court case that revolved around maritime law and the liability of ship owners for damages caused by their vessels. The steamship "Sydney" collided with another vessel, causing significant damage to both ships. The owner of the damaged vessel sued for compensation but was initially denied due to an existing legal principle known as 'limited liability', which protects ship owners from being held fully responsible for accidents at sea beyond the value of their own vessel post-accident. However, upon appeal to the Supreme Court, it was ruled that this principle did not apply in cases where negligence could be proven on part of the crew or captain - as was found in this instance. Therefore, despite limited liability laws typically protecting shipowners from extensive financial responsibility following maritime accidents; if there's evidence proving negligence by those operating the vessel then they may still be held accountable for all resulting damages.

In the dissenting opinion for The Sydney case, it was argued that the majority's decision to hold a ship liable for damages caused by its cargo of explosives was incorrect. This view held that liability should be based on negligence or wrongdoing and not simply because damage occurred. It emphasized that there were no regulations prohibiting the transport of such dangerous goods at sea during this period, nor any requirement to notify other ships about their presence onboard. Therefore, in absence of these rules and without proof of negligence or intent to cause harm, holding the ship responsible seemed unjustified. Furthermore, it pointed out inconsistencies in applying maritime law principles as well as potential negative implications on trade due to increased risk exposure for shipping companies carrying hazardous materials legally and with necessary precautions.