HR Smith Model 503 Series Emergency Locator Transmitter
 
- Transmit the signal and coordinates of the crashed aircraft.
- Signal transmission frequency: 121.5MHz / 243MHz / 406MHz
- Automatic activation when the G-Switch detects an impact, or manual activation by the pilot via the remote control panel in the cockpit
- Can be used with fixed-wing and rotary-wing aircraft
- When activated, it will send a signal every 50 seconds for up to 48 hours.
- Compliance COSPAS/SARSAT and EUROCAE standards