C-130 Aft Fuselage antenna

[Rivet1]

Does anyone know what the antenna on the aft fuselage, just behind the national insignia, Is called and what it does?

[BWScholten]

DIRCM, defensive system for defeating IR SAMs (MANPADS). Flat cover gets removed and a laser head gets installed.

[Rivet1]

Thanks for the info.