The indispensable cog (Friends)

4470.293 - 4493.645 Johnny Boursiquot

Apparently it's like a small island or something, a ring-shaped reef in the Indian Ocean known as the Chagos Islands. The islands would be handed over to the neighboring islands country of Mauritius. Mauritius, thank you. Apparently more well-versed in these geographies than I am. About 1,100 miles off the southeastern coast of Africa. Long story short is that IO is for Indian Ocean.