Case file · Unidentified submerged object

'Tic-Tac' dives beneath the sea

In the Nimitz encounter, radar tracked the object dropping from 80,000 ft toward the ocean surface and away — a UAP/USO crossover.

2004 CE · 32.60, -117.60 · status: unexplained

The researched reading

The dramatic ‘dive to the sea’ is the least documented part of the Nimitz case. It may be a radar artefact; it may be part of something real.

Explanation	Weight	Why
Genuinely anomalous	24%	The crossover claim rests on second-hand radar descriptions, so it carries less weight than the visual encounter it belongs to.
Something known, misidentified	18%	If the radar returns were real objects, slow balloons or drones are the commonest culprits; the sea disturbance could have been unrelated.
A known natural phenomenon	18%	Sudden ‘drops’ of tens of thousands of feet are a known artefact of radar height-finding errors, ducting and false returns, and the description comes from radar operators’ recollections, not data.
Perception, memory or mind	16%	The descent story was told years later, and the link between the radar tracks and the water disturbance is an interpretation.
Secret human technology	16%	A test vehicle or drone operating near the fleet is possible but unconfirmed.
A poorly understood natural phenomenon	4%	No known natural object moves between high altitude and the sea surface like this.
A hoax or fabrication	4%	There is no sign of deliberate invention by the radar operators.

Official position: No official statement addresses the reported dives; the Nimitz encounter as a whole remains officially unidentified.