Description
⚓ Bottom Line Up Front (BLUF)
The ONWA KTD-TM820C is a high-performance transom-mount dual-frequency 50/200 kHz transducer engineered for planing fishing boats, RIBs, and commercial craft. Built with a hydrodynamic low-drag polymer housing and a 316 stainless steel kick-up safety bracket, it provides clear bottom imaging at vessel speeds up to 30 knots, deep sounding down to 600 meters, and integrated water temperature readings. Supplied with complete mounting hardware by Seanav Marine, Dubai Maritime City.
Technical Overview & Marine Operational Capabilities
The ONWA KTD-TM820C Transom Mount Sonar Transducer represents ONWA Marine Electronics’ advanced engineering for commercial fishing, workboat, merchant marine, and offshore yacht operations. Designed to operate continuously under harsh saltwater environmental exposure, vibration, and thermal fluctuations, this equipment integrates precision acoustic, RF, or digital telemetry circuitry providing outstanding reliability.
Supplied and supported throughout the Middle East, Arabian Gulf, and Red Sea by Seanav Marine (headquartered at Dubai Maritime City, UAE), every unit is backed by an authentic factory warranty, comprehensive technical documentation, immediate regional inventory availability, and certified marine electronics field commissioning.
Key Features & System Advantages
- Certified Marine Durability: Engineered in full compliance with IEC 60945 and international marine environmental standards for vibration resistance, thermal shock, and IP ingress protection.
- Universal Network Interoperability: Standard NMEA 0183 and NMEA 2000 Micro-C protocols ensure plug-and-play communication with bridge MFDs, GPS sensors, autopilots, and Voyage Data Recorders.
- Signal Precision & Low Noise: Advanced digital filtering eliminates acoustic or RF interference from onboard generators, inverters, and vessel communications.
- Low Total Cost of Ownership: Designed for continuous commercial operation with high mean time between failures (MTBF), low power consumption, and easily accessible spare parts.
- Dubai Maritime City Certified Support: Full local warranty, bench calibration, spare parts availability, and 24/7 attendance across UAE and GCC ports.
Technical Specifications
Vessel Suitability & Marine Applications
- Commercial Fishing Fleets: Trawlers, purse seiners, longliners, and coastal fishing boats requiring dependable depth sounding, gear tracking, and navigation.
- Offshore Support & Workboats: Crew boats (CTV), harbor tugs, pilot launches, and supply vessels operating in high-traffic offshore fields.
- Merchant & Cargo Ships: Auxiliary navigation displays, secondary depth sensors, bridge data distribution, and monitoring telemetry.
- Private Yachts & Cruisers: Helm modernization, chartplotter expansion, AIS tracking, and radar security upgrades.
Standard Package & Included Accessories
- ONWA KTD-TM820C Transom-Mount Transducer
- 316 Stainless Steel Kick-Up Bracket & Fasteners
- Cable Clamps, Screws and Alignment Guide
Frequently Asked Questions (FAQ) – Expert Insights
Q: How does the kick-up bracket protect the KTD-TM820C transducer?
A: The heavy-duty 316 stainless steel bracket features an impact-release spring latch that allows the transducer to pivot upward if it strikes floating debris or ground in shallow water, preventing hull and bracket damage.
Q: What frequencies and beamwidths are supported?
A: It operates at 50 kHz (45° beamwidth) for deep water structure search and 200 kHz (12° beamwidth) for crisp fish arch definition and seabed discrimination.
Q: Can the KTD-TM820C maintain bottom lock at high cruising speeds?
A: Yes. The hydrodynamic wedge profile creates laminar water flow across the acoustic face, reducing cavitation bubbles and maintaining solid bottom lock at speeds exceeding 25 knots.
Q: Does the transducer include a water temperature sensor?
A: Yes. It incorporates an integrated temperature sensor accurate to ±0.5°C, essential for finding thermal breaks where pelagic game fish congregate.
Q: Which ONWA sounders can use this transducer?
A: It is directly compatible with the ONWA KP-27F, KP-27X, KP-29F, KP-29X, KM-8C, KM-12X, KCombo-7, and K-ProVision series.
Q: What is included in the package from Seanav Marine?
A: The package includes the transducer with 8m cable, stainless steel transom bracket, stainless hardware, cable clips, and an alignment template.
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Manufacturer documentation and compatibility
Select the exact model, hardware generation and document revision. Before ordering, confirm the equipment interfaces, power requirements, required approvals and included accessories against the applicable manufacturer documentation. Send nameplate photographs, the installed equipment details, vessel name, port and ETA with your enquiry.
