JANUS is identified as NATO's STANAG 4748 protocol for digital acoustic communication. The dial-up-modem comparison emphasizes limited data capacity, and the quoted range is uncertain and below roughly 30 kilometres. Existing mine-countermeasure vehicles operate under relatively local control. Excalibur's Australian trial then raises questions about the amount of data needed and whether control scales to many vehicles. The suggestion that communications demand explains more cautious language after the trial is a personal inference, not a reported trial finding.
Notable Point · 1:24:23-1:26:42
JANUS and the difficulty of scaling underwater control
Short acoustic links illustrate why one successful uncrewed submarine trial does not settle fleet-scale command requirements.