船只夜间航行所显示的两种灯中的一种，左舷为红色，右舷为绿色。

Nautical Either of two lights, red to port, green to starboard, shown by ships at night.

youdao

船只夜间航行所显示的两种灯中的一种，左舷为红色，右舷为绿色。

Nautical Either of two lights, red to port, green to starboard, shown by ships at night.

youdao