COLREG Annex I – Positioning and Technical Details of Lights and Shapes – Set C
Source: Convention on the International Regulations for Preventing Collisions at Sea, 1972 (COLREG), Annex I – Positioning and Technical Details of Lights and Shapes.
Reference: imorules.com – COLREG Annex I
Question 7 of 10
7. All-round lights shall be so located as not to be obscured by masts, topmasts or structures within angular sectors of more than: