M_Boats: Navigation lights M15

Do any of you skippers have your navigation (red and green) lights installed on top of the mast? It seems to be illegal when powering when the steaming light is on . I thought the steaming light was to be above the navigation lights. Also are deck mounted navigation lights installed at 112/2 = 56 (not 90) deg off Hull CL? I am outfitting Pelican to navigate in the steamer lanes off Channel Islands. The container ship needs to see me in time to change course. LOL Get Outlook for iOS<https://aka.ms/o0ukef>