External broadcasting while remaining discrete is a major challenge for all submarines.
To meet this challenge, ALSEAMAR designs and develops:
towed multifunction antennas (TMA) that allow transmission and reception in the HF, VHF and UHF frequencies;
small expendable communication buoys released via the Sippican airlock bay. The buoys float to the surface and remain connected to the submarine via a wire connection. The buoy then acquires the GPS or AIS position or situation, which is then transmitted to the submarine. Once the link is broken, the buoy is scuttled.