This 301-113 sleep black h 3 nm 50+ m provides a purpose-specific solution for onboard use. Reference article: 186913AZ. Visibility: 3 NM. Vessel range: for vessels in the 50+ m class. Horizontal mounting. Lopolight LED navigation light with IP68 protection and 10–32 VDC supply, intended for marine navigation in accordance with COLREG72. The standard housing uses anodized aluminum with a PMMA lens and A4 stainless-steel fasteners.