Sea-Dog Stainless Steel Comination Bow Light Stamped 304 Stainless Steel 2nm Stainless Steel. Stainless LED Combination Bow Light (400059) is approved for USCG 2 NM (Colreg 2 mile) and is constructed of corrosion resistant stamped 304 stainless steel with a cast 316 stainless steel base. Installs with two #8 RH fasteners (not included). IP67 waterproof rating. All USCG approved navigation lights must be mounted properly to provide the correct visual alignment and allow unimpeded sight lines. Please refer to USCG regulations for 1 NM and 2 NM navigation lights for more information. Specifications for Sea-Dog Stainless Steel Comination Bow Light: Manufacturer: Sea-Dog Light Type: Interior Color: Stainless Steel Package Contents: Sea-Dog Stainless Steel Comination Bow Light Sea-Dog 400059-1: Stainless Steel Comination Bow Light Stamped 304 Stainless Steel 2nm Stainless Steel