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SI-TEX MDA-5 Hi-Power 5W SOTDMA Class B AIS Transceiver w/Built-In Antenna Splitter & Long Range Wi-Fi
The SI-TEX MDA-5 delivers elite 5W SOTDMA Class B+ transmission for US offshore cruisers, featuring a built-in VHF antenna splitter and high-gain long-range WiFi for mobile device integration.
- Transmission Power: 5-Watt SOTDMA Class B+ Priority Logic
- Wireless Tech: Integrated High-Power Long Range WiFi Hub
- Internal Splitter: Zero-Loss VHF Antenna Sharing Technology
- GPS Hub: Includes External 72-Channel GNSS Antenna
- Networking: NMEA 2000, NMEA 0183, and High-Speed USB
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Description
SI-TEX MDA-5 | 5W SOTDMA AIS w/ Splitter & Long Range Wi-Fi
Streamline your mobile navigation using the SI-TEX MDA-5, a high-power 5W SOTDMA Class B AIS transceiver featuring an integrated antenna splitter and long-range Wi-Fi. This unit provides the superior visibility of 5W transmissions while wirelessly streaming target data to your mobile devices, allowing for a flexible helm setup that maintains professional-grade safety standards in high-density maritime environments.
Tailored for offshore sailors and coastal cruisers, the MDA-5 eliminates the need for a second antenna. Strategic placement of the unit to avoid signal-blocking bulkheads is critical to maximizing the Wi-Fi broadcast range, ensuring your tablets and smartphones receive uninterrupted real-time AIS data during critical night transits or fog maneuvers.
Technical Key Features
- High-power 5W SOTDMA Class B+ transmission.
- Integrated zero-loss VHF antenna splitter logic.
- Long-range Wi-Fi for mobile device connectivity.
- NMEA 2000 and NMEA 0183 data output.
- Internal GPS engine for high-precision timing.
- Rugged water-resistant housing for bilge mounting.
- Connects multiple wireless devices simultaneously.
SI-TEX MDA-5 Hi-Power 5W SOTDMA AIS (WiFi) Specifications
| Communication Type | High-Power Class B+ AIS w/ Long Range WiFi |
| AIS Class/Protocol | SOTDMA (Class B+ Priority Logic) |
| Output Power | 5W (High) / 1W (Low) |
| Frequency Range | 156.025 – 162.025 MHz |
| Reporting Rate | Up to Every 5 Seconds (Speed Dependent) |
| Operating Voltage | 12V / 24V DC Support |
| Current Draw | < 2.5A Peak / 250mA Average (WiFi Active) |
| Interface/Networking | NMEA 2000, NMEA 0183, WiFi (Long Range), USB |
| Internal GPS | Integrated 72-Channel GNSS Receiver |
| Display Type | Multi-LED Status & Diagnostic Indicators |
| Waterproof Rating | IPX7 Fully Waterproof Unit |
| Operating Temperature | -15°C to +55°C Marine Grade |
| Length (Overall) | 170 mm Chassis Depth |
| Width/Diameter | 128 mm Body Width |
| Weight | 0.68 kg (1.5 lbs) |
| Included Accessories | GNSS Antenna, Power/Interface Cable, VHF Patch Cable |
| Key Mechanical Feature | Built-In Zero-Loss Splitter & high-output WiFi antenna |
em-trak B100 Class B AIS Transceiver Technical Guide
The B100 is a world-renowned AIS transponder known for its extreme reliability and ease of use. It is a "classic" workhorse in the marine industry, providing a stable 2W CSTDMA transmission that is ideal for coastal cruising and recreational sailing.
It features an integrated SD card slot for data logging. This allows you to record all AIS data from your voyage, which can be used later for trip analysis on a PC or as a record of your vessel’s movements in case of an incident.
The unit provides NMEA 2000 and NMEA 0183 connectivity, ensuring it can talk to both modern MFDs and older chartplotters. It also has a USB port, making it a favorite for boaters who use laptop-based navigation software like OpenCPN.
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