This is the method I've always seen here in the US, where we call them range lights [0]. There are lights for night alignment and striped boards for daytime. Ma

This is the method I've always seen here in the US, where we call them range lights [0]. There are lights for night alignment and striped boards for daytime. Many years ago I used to maintain these systems in the Caribbean and the Long Island Sound with the US Coast Guard. [0] https://en.m.wikipedia.org/wiki/Leading_lights https://en.m.wikipedia.org/wiki/Leading_lights