When returning to port from seaward and you see red?

When returning to port from seaward and you see a red light, it indicates that you are approaching a portside marker or buoy, which is typically used to guide vessels safely into harbor. In navigation, a red light means you should keep it on your port (left) side when entering. This is part of the "IALA Buoyage System," where red marks indicate the left side of the channel when entering from the sea. Always ensure to follow navigational rules and regulations for safe passage.