Commando unit 87 was a Space Pirate sent to the Torvus Bog to evaluate its potential as a new Pirate base. It failed to report, however, and another unit, 98 was sent to investigate. It may be that unit 87 was one of many Dark Pirate Commandoes Samus fought and killed in the Bog. The scan is mentioned in the Command Center before Samus explores the Bog.
"Security Report, 07.202.06
Commando unit 87 has failed to report. Unit was dispatched to recon the swamp, a potential site for a new base. Unit 98 sent to investigate."