Britain's newest aircraft carrier flooded to the depth of 3ft after a water leak in the engine room.
It is the second time HMS Prince of Wales  a 3.1billion state-of-the-art ship  has flooded in the past five months.
Footage filmed by crew members showed water gushing down the stairs and submerging electrical cabinets and pipes.
An internal system developed a fault causing the flood on board the 65,000-ton warship while it was at its home port of Portsmouth Naval Base on Thursday.
It is the second time that the warship has developed a leak. In May a video emerged of water pouring through the ceiling into an accommodation area.