Nautical dusk is a term used to describe the period of time when the sun is below the horizon, but there is still some light visible on the horizon. This period of time is known as "twilight," and there are several words that can be used to describe it. Some synonyms for nautical dusk include maritime twilight, sea twilight, and oceanic twilight. Other terms that can be used to describe this time of day include crepuscular period, gloaming, and vesper time. Whatever term you choose to use, nautical dusk is a unique time of the day that can present some beautiful and serene views over the horizon.