one of the impulse ejections to a certain extent follows in the wind shadow of the medium of the other impulse ejection thus increasing the range with the technology now available a sufficient time proximity of two impulse ejections can only be achieved with considerable technical complexity if at all however it was found that with an arrangement of two adjacent and independent ejection tubes corresponding time coordination is comparatively simple to achieve as long as the distance of the ejection ends across the ejection direction with essentially the same ejection direction is sufficiently small relative to the desired shot range good results can be achieved at distances of as little as 0 5 m and less at shot ranges of 30 m and more the ejection ends do not have to be situated at the same height for example one of the ejection tubes can also be offset in the ejection direction relative to the other one in which case a wind shadow effect can also be achieved during a simultaneous shot of both ejection tubes operation of another advantageous variant not shown of the present invention is described below which corresponds in its dimensioning to the known ifex dual intruder see above the device is equipped with.