Geology governs sites for submarine transmitters

Could Brazil or Argentina build the large systems needed to communicate with submerged submarines?

Brazil is considered plausible and Argentina uncertain because tectonic conditions and geological stability matter as much as available land.

Brazil is considered a probable candidate for a large submarine-communication installation, while the answer is less certain about Argentina. The assessment depends on the tectonic conditions and geological stability of the proposed location. Available land alone does not settle the question. A geotechnical engineer would be needed for a firmer judgment, and the answer explicitly acknowledges that expertise limit.