Cofferdam: Watertight enclosure from which water is pumpedto expose the Bed of a Body of water in order to permit the construction of a pierorotherhydraulic work.
Mr Knight thinks that although it is a relief to have an end date that train operators have to work towards, the important thing is make sure that the regulations are watertight.
It has a built-in filtered fan system for particularly hot days, and a heater which allows it to work in temperatures of around -4 degrees C (24 degrees F), plus a watertight cable system for a range of sources including HDMI, component, VGA, S-video, composite, and RF.