Twistlock and a method for operating a twistlock

A method of operating a twistlock, suitable for the interconnection of an equipment module or cargo container to a mounting surface, said twistlock comprising a housing, an elongated shaft element, and a top element for interconnection with a part of said equipment module or cargo container, wherein said shaft element and top element are rotationally and longitudinally displaceable within said housing, said method comprising the following steps:

• displacing said elongated shaft element and said top element in a first longitudinal direction of said shaft element over a first distance, such that said top element projects into said part of said container,
• displacing said elongated shaft element and said top element in said first longitudinal direction of said shaft element over a second distance and simultaneously rotating said top element around at least a part of approximately 90 degrees in relation to said longitudinal direction,
• displacing said elongated shaft element and said top element over a third distance in a second longitudinal direction being opposite said first longitudinal direction such that said top element locks said module or container to said mounting surface.