244Misfire when signal tube detonator used

244 Misfire when signal tube detonator used (1) This section applies if— (a) there is a misfire after a signal tube detonator has been used; and (b) the shot-firer proposes to use a procedure under section 242 (Blasting strategy to deal with misfire) to deal with it. (2) The shot-firer must ensure, if practicable, that the signal tube from the detonator in the misfired blast hole is firmly secured to a fixed object so as to allow the recovery of the detonator.