ANSWER: Ethical and regulatory considerations for autonomous aircraft in emergencies include ensuring AI decision-making aligns with human ethical standards, prioritizing passenger and public safety, maintaining transparency, and having robust fail-safe mechanisms. Regulations must establish clear accountability, certification standards, and strict oversight. Ethically, AI should emulate humane decision-making, considering all stakeholders. Ensuring algorithmic fairness, non-bias, and continual monitoring is paramount to gaining public trust and regulatory approval.