 The antennae for the system are integrated into the mastheads of both the SERO 400 and OMS-100 periscopes.The submarine's ELINT electronic intelligence system is the Saab S/UME-100 tactical electronic support measures which provides electronic intelligence analysis and amplitude direction finding capability.The S/UME-100 comprises the ESM antenna, the radar warning receiver antenna, a signal distribution unit and an electronic warfare controller.