Nautical Term: Deadlight
Definition of Deadlight
A Deadlight is an internal steel or alloy cover plate installed in portholes for added security against water ingress. In the event of glass failure, the Deadlight effectively seals the porthole, preventing water from entering the vessel.
For instance, during a storm at sea, the waves relentlessly pound against the hull of a ship. The portholes, despite being sturdy, eventually succumb to the immense pressure and shatter into pieces. But thanks to the Deadlight, the water that would have otherwise flooded into the cabin, is kept at bay, ensuring the safety and comfort of the passengers and crew.
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