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… If practical, permanent CL-864 and CL-810 obstruction lights are installed and operated at each level as … to light the structure during the construction phase. The lights are positioned to ensure that a pilot has an …
44.032
… Canadian windfarm to use two CL 864 horizontally separated lights with one operating and one standby in place of a vertical arrangement with the lights installed on top of each other as prescribed in … over a Canadian windfarm and who plans to install top lights required in Chapter 12, paragraph 12.3(2)(a) of …
61.807