Something about the hull materials just absorbed or bounced off at an angle almost any radar that hit it. She could also dump all her waste heat into internal heat sinks for several hours and run liquid hydrogen through capillaries in her skin, keeping the hull temperature pretty close to zero. Unless someone was really looking for her, she’d just show up as a slightly warmer spot in space with a radar profile not much bigger than a bunk bed. Alex could remember when a destroyer with similar technology had killed his old ship the Canterbury.