It has been shown that moving type-IV bursts at decameter waves are infrequent events compared with the moving type-IV bursts at meter waves. They belong preferably to sunspot groups of relatively homogeneous magnetic structure. Moving type-IV bursts at decameter waves have a very low tendency to repeat. This statement indicates that the magnetic structures producing them have only a short lifetime. The short duration of these bursts cannot be interpreted by radiation damping of high energetic electrons. Furthermore it can be shown that the storm continuum at decameter waves is related preferably to sunspot groups of complex magnetic structure. Probably stationary type-IV bursts at decameter waves are more representative for the acceleration of high-energetic particles than the moving type-IV bursts at decameter waves.