Portable Navilight 2NM TriColor. The Navilight Tricolor 2NM US Coast Guard approved for 2 nautical miles includes a green light to be shown at the starboard side and a red light to be shown at the port side. In addition, it includes the white Sternlight, to be used at the stern. It is battery operated, uses super bright LED light, is water proof, floats and attaches almost anywhere through its double magnetic mounting system. The green as well as the red lights show an unbroken light over an arc of the horizon of 112,5 Degrees. The white Sternlight shows an unbroken light over an arc of the horizon of 135 Degrees. All lights work independently, in a combination of all three or red/green together. Examples of usage *Based on the Convention on the International Regulations for Preventing Collisions at Sea, commonly called 72 COLREGs. On a power-driven vessel of 12M or more in length but less than 50M in length As green or red sidelight. As sternlight. On a power-driven vessel o The Navilight Tricolor 2NM US Coast Guard approved for 2 nautical miles includes a green light to Examples of usage . *Based on the Convention on the International Regulations for Preventing Collisi On a power-driven vessel of 12M or more in length but less than 50M in length . As green or red side As sternlight. On a power-driven vessel of less than 12M in length as green or red sidelight as combined green / red as sternlight