Final answer:
In the context of maritime safety, the number of pyrotechnic visual distress signals required onboard can vary depending on the maritime regulations.
Step-by-step explanation:
In the context of maritime safety, pyrotechnic visual distress signals are required for emergencies at sea. These signals are used to attract attention and communicate distress to nearby vessels or authorities. The specific number of pyrotechnic visual distress signals required to be onboard can vary depending on the maritime regulations of the country or region you are in. It is important to check the maritime laws and regulations applicable to your location to determine the exact quantity.