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The SAMYUNG ENC SEP-406 is a 406 MHz Cospas-Sarsat GMDSS EPIRB designed for maritime distress alerting and search-and-rescue operations. It transmits on 406.025 MHz for satellite detection and 121.5 MHz for homing. The unit uses an automatic float-free arrangement with a hydrostatic release system.
| Parameter | SEP-406 Specification |
|---|---|
| Manufacturer | SAMYUNG ENC Co., Ltd. |
| Model | SEP-406 |
| Equipment Type | 406 MHz EPIRB |
| System | Cospas-Sarsat / GMDSS |
| EPIRB Class | Class II |
| 406 MHz Frequency | 406.025 MHz ± 0.002 MHz |
| 406 MHz Output Power | 5 W ± 2 dB |
| Radio Type | G1B |
| Modulation | Phase modulation, 1.1 ± 0.1 rad |
| Data Encoding | Bi-phase L |
| Bit Rate | 400 bit/s |
| Transmission Interval | 50 s ± 5% |
| Transmission Duration | 440 ms ± 1% |
| Homing Frequency | 121.5 MHz |
| Homing Output Power | ≥75 mW |
| Homing Radio Type | A3X |
| Homing Modulation | AM, 300–1600 Hz sweep |
| GPS/GNSS | No |
| Battery | Lithium chloride (Li-SOCl₂) |
| Battery Service Life | 4 years |
| Operating Life | 48 h at −20°C / 80 h at +20°C |
| Operating Temperature | −20°C to +55°C |
| Storage Temperature | −40°C to +65°C |
| Housing | ABS plastic |
| Waterproofing | Watertight to 1 bar |
| Strobe Light | ≥0.75 candela |
| Strobe Rate | 20 flashes/minute |
| Activation | Manual / automatic water activation |
| Float-Free Release | Hydrostatic release |
| Release Unit | SEH-02 |
| Release Depth | Approx. 2–4 m |
| Weight | Approx. 1.7 kg |
| Origin Country | South Korea |
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