21. On 60 meters hams are restricted to only one signal per channel and automatic operation is not permitted. 22. This design suffered from the disadvantage that automatic operation was lost and the interrupter had once again to be hand-cranked. 23. The SMG-68 is a . 68 caliber version of the SMG-60, configured for semi-automatic operation , and featuring a removable barrel. 24. Wadjemup Lighthouse was converted to automatic operations in November 1986 and is currently operated to the Australian Maritime Safety Authority. 25. The average user will appreciate its largely automatic operation , though, while experts enjoy the powerful tools and extreme configurability ." 26. There is also an option to override the automatic operations of the Master Control Board for the three devices listed above. 27. The new lighthouse was converted to automatic operation in 1990 resulting in the departure of the lighthouse keepers and their families. 28. By 1970, studies progressed far enough to allow the construction of an automatic single-and 3-shot burst model but without full-automatic operation . 29. It was described as the " world's largest push-button yard . " The eastbound hump yard was installed with semi-automatic operation . 30. Five of the six trains of 1960 stock were modified, and automatic operation of the branch began on 5 April 1964.
