Autonomous ships, greater efficiency, fewer mistakes, changing threats, new challenges to security. The benefits of autonomous ships lie in avoiding collisions and maximizing efficiency, but how can we ensure that our vessels and crew are equipped to complete their journeys safely while assaulted by new threats? Many of us may not need to fully understand the technological workings behind these developments, but we do need to understand the implications of using autonomous ships and how the threats we face will change. This article will provide a brief look at the implications for threats facing autonomous ships at various degrees of their development in comparison to current threats.