The TSO was issued to the ELT406 w/GPS as a system and this system was designed, tested and
certified as a unit. All four components are required to meet the TSO. Substitution of any part is
strictly prohibited. They will include in some variant:
• ELT Transmitter w/ Integral Battery
• ELT Mounting Tray
• ELT Antenna
• ELT Remote Switch
Figure 1.1 provided by Cospas/Sarsat