What action is required of powerboat A when approaching sailboat Be head on in darkness or reduced visibility?

When powerboat A approaches sailboat B head-on in darkness or reduced visibility, it is required to take evasive action to avoid a collision. According to the International Regulations for Preventing Collisions at Sea (COLREGs), both vessels should alter their course to starboard to pass each other port-to-port. Additionally, powerboat A must maintain a proper lookout and ensure it is navigating safely while considering the conditions.