— [engine hum]
— [impact on hull]
— PILOT: "what was that"
— [impact on hull]
— PILOT: "it's on the side"
— [metal creak]
— PILOT: "no no no"
— [impact]
— PILOT: "i can hear it. i can hear it moving"
— [sound resembling scraping]
— PILOT: "it's not swimming"
— PILOT: "it's walking"
— [DATA EXPUNGED]
— PILOT: "please don't answer. please don't answer."
— [alarm]
— [catastrophic failure]
RECOVERY NOTE: recorder found on ocean surface 14 hours after mission failure. exterior casing shows deep parallel grooves consistent with [REDACTED]. interior mechanism undamaged despite exterior trauma. final 3 seconds of audio contain sounds that do not match any known biological or mechanical source.