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The Koden CVS-128B is a professional marine echo sounder / fish finder system designed for commercial fishing vessels and navigation support, developed as an upgraded version in the CVS series.
It is used for accurate depth measurement, seabed tracking, and fish detection in both shallow and deep-water operations.
The CVS-128B operates using:
| Parameter | Specification |
|---|---|
| System Type | Broadband / fish finder echo sounder |
| Display Type | Color TFT LCD |
| Display Size | 8.4 inch |
| Display Resolution | 640 × 480 (VGA) |
| Output Power | 2 kW (RMS) |
| Frequency Type | Dual / broadband selectable |
| Frequency Range | 38–65 kHz (LF) / 42–65 kHz & 130–210 kHz (HF) |
| Frequency Adjustment | 0.1 kHz step selectable |
| Depth Range | 2.5 m – 1200 m (approx. 3600 ft) |
| Zoom Range | Up to 200 m (variable zoom functions) |
| Minimum Depth | ~2.5 m |
| Operation Mode | Auto / Manual |
| Signal Processing | Koden Digital Filtering (KDF™) |
| Noise Reduction | Advanced digital filtering system |
| Bottom Tracking | Automatic seabed detection |
| Fish Detection | Yes (fish + school detection) |
| Display Modes | Single frequency, dual frequency, zoom, NAV mode |
| A-Scope Function | Yes |
| Image Storage | Up to 10 images stored |
| Alarm Functions | Fish, bottom, temperature, speed (optional sensors) |
| Special Functions | Sona-Tone™, Fishing Hot Spot, Auto gain/range/shift |
| Presentation Colors | 64 / 16 / 8 colors |
| Background Colors | Multiple selectable (marine blue, black, etc.) |
| Interface | NMEA 0183 compatible |
| Input Data | GPS, navigation data |
| Output Data | Depth (DBT/DPT), navigation signals |
| Power Supply | 10.8 – 31.2 V DC |
| Power Consumption | ~25–30 W |
| Waterproof Rating | IPX5 |
| Operating Temperature | −15°C to +55°C |
| Storage Temperature | −20°C to +70°C |
| Weight | ~3.5 kg |
| Dimensions | 274 × 133 × 263 mm |
| Transducer Type | Broadband hull-mounted transducer |
| Application | Fishing vessels, trawlers, commercial marine use |
| Compliance | Marine electronics standards (non-IMO navigation primary) |
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