If two boats are heading straight on which has the stand-on vessel?

When two boats are approaching each other head-on, both vessels are required to take action to avoid a collision. In this situation, neither boat is designated as the stand-on vessel; instead, both should alter their course to starboard (right) to pass safely. However, if visibility is poor or the situation is unclear, it's important for both vessels to communicate and take necessary precautions to prevent an accident.