All cases / From orbit / Chiao's check mark
2005
Outside the International Space Station, during a spacewalk
"in a line," "upside-down check mark"The witness's own shape words
Chiao reported lights in a formation he described as "in a line" and like an upside-down check mark. The 2014 series Are We Alone? promoted it as a possible UFO. Chiao later identified the lights as fishing boats hundreds of miles below.
Leroy Chiao, ISS Expedition 10 commander
Fishing boat lights (Chiao's own identification)
Wikipedia, citing *Huffington Post*, March 2, 2014