Why the southern Indian Ocean lacked another major naval base

Were there proposals to build a naval base in the southern Indian Ocean?

Useful sites were scarce, and a remote island base would be expensive to supply; expanding Perth, Trincomalee, or existing island infrastructure was much more practical.

The panel points first to Perth and Trincomalee, then notes that a truly southern location quickly runs into sparse geography and Antarctic conditions. Islands such as Diego Garcia can support bases, but every isolated station needs a costly supply and sustainment chain. Existing infrastructure can be expanded; securing peacetime money in the 1930s or 1940s to create a remote base from scratch would be much harder.