It is located in the northeastern part of the Chagos Archipelago, near Speakers Bank and Blenheim Reef.
Note that these early Landsat images covered a footprint on the surface of the earth of about 100 nautical miles (185 km) on a side.
The original Landsat Multispectral Scanners (MSS) (On Landsat/ERTS 1-5) imaged the earth with several spectral bands.
[4] The original depth data for the shallow water areas on Chagos Archipelago nautical charts had been collected in the mid-1830s.
By the summer of 1976 a new edition of the Chagos Archipelago nautical chart (#61610) was printed showing the corrected positions of the banks and shoals as well as Colvocoresses Reef.