From a purely physics-based perspective in 2026, every ship is technically sinkable. Any vessel that relies on buoyancy—displacing a weight of water equal to its own weight—will sink if its density becomes greater than that of the water. This occurs when the hull's integrity is compromised, allowing water to replace the air inside. While modern naval architecture uses watertight bulkheads and "double hulls" to compartmentalize damage (a lesson learned from the Titanic), these systems can still fail if the damage is extensive enough to flood too many compartments or if the ship's structural "back" breaks. Even "unsinkable" foam-filled small craft can be destroyed by fire or extreme mechanical force. Furthermore, if a ship is caught in a "rogue wave" or loses stability due to shifting cargo, it can capsize, which is technically a form of sinking as the vessel ceases to function as a buoyant platform. Therefore, while modern ships are incredibly safe and engineered to withstand massive trauma, no human-made vessel is immune to the laws of hydrostatics and the overwhelming power of the ocean.