A gyratory crusher crushing head, removably mounted a crushing shell, includes a circumferential groove is formed in an outer facing surface of the crushing head. The soft output information of a channel decoder is fed back and utilized by a soft demapping device in order to improve the decoding result by further iterative decoding steps. The protective sleeve is compressed in a storage-position, and in a use-position it is extended to cover most of the insertable length of the catheter. At least a portion of the SCADA data for a selected group of the wind farm parameters is dynamically configured using a graphical user interface that interfaces with a rules engine.