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SI-TEX MDA-4 Fixed Mount DSC VHF Radio NMEA 2000 with Dual-Channel AIS
Shown with Remote Command Mic

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SI-TEX MDA-4 Fixed Mount DSC VHF Radio NMEA 2000 with Dual-Channel AIS

  • Includes Remote Mic, Class D DSC, AIS Receiver, Hailer/ Foghorn
  • Current Draw @ 13.8 Volt DC, RF Output Power 25 Watt / 1 Watt
  • Waterproof Rating: IPX7 Submersible, Mount: Bracket
  • Item #: 
    Model #: 


    Shipping Weight: 
    7.00 Lbs.
    List Price: 
    Reg. Price:
    Sale Price:
    Status:  null In Stock

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    Defender Exclusive! Includes Optional Full-function Remote Command microphone


    • The SI-TEX MDA-4 is ready for action on recreational and commercial fishing boats, workboats and more
    • Includes full-function Remote Command microphone
    • Compatible with Optional GNSS 66-channel smart GPS antenna (Sold Separately)
    • This rugged package combines an advanced VHF-FM / DSC radio/telephone with a quality built-in Dual Channel AIS Receiver
    • Ruggedized to Military specifications to stand up to tough conditions and years of hard professional use
    • Includes Dual Watch, Tri-Watch and Programmable Scanning Modes
    • Robust 25 Watt loud hailer / foghorn with (8) selectable modes and listen back
    • High-performance dual-channel AIS receiver
    • The large LCD display provides important AIS data
      • MMSI, Call Sign, Ship's Name, Bearing, Distance, Speed Over Ground and Course Over Ground
      • Also includes alerts for Closest Point of Approach and Time to Closest Point of Approach
    • The MDA-4 can also provide important navigation data like Lat/Lon, Date, Speed Over Ground and Course Over Ground.
    • Bracket Mount or Flush Mount
    • Standard 2-year warranty

    Click Here for an Installation Guide and Owner's Manual for this Product


    • General
      • Dimensions: 8" L x 4.25" W x 2.25" H
      • Dimensions w/Bracket: 8.5" L x 5.25" W x 2.25" H
      • Connectivity NMEA2000, NMEA0183
      • Power Supply 13.8 Volt DC
      • Environmental
        • MIL-STD-810G Standards
          • Meets MIL-STD-810G specifications for Altitude, High Temperature Low Temperature, Temperature Shock, Contamination by Fluids, Solar Radiation, Rain, Humidity, Salt Fog, Sand & Dust, Immersion, Vibration, Shock
        • ITU Standards (Worldwide Telecommunications Standards)
        • IPX7 Waterproof
    • AIS Receiver
      • Frequency 161.975MHz / 162.025MHz
      • No. of Channels (2) Dual Channels
      • Local Oscillator Mode PLL
      • Ambient Operating Temperature -15° C to +55° C
    • VHF Radio
      • TX Frequency 156.025-157.425 MHz
      • RX Frequency 156.050-162.025 MHz
      • Channels All USA, Canada and INT channels, plus private channels
      • Microphone Wired handheld channel up/ down, power high/low and quick 16/9 channel access, extra-long mic cord for commercial wheelhouses
      • Modulation Mode FM (16K0G3E/DSC (16K0G2B)
      • Antenna Impedance 50 Ω nominal
      • Receiver Sensitivity 0.22 micro-volts (SINAD-12 dB)
      • Spurious Response Rejection 70 dB
      • Adjacent Channel Rejection 70 dB
      • Audio Output Power 5 Watt @ 4 Ohm
      • Hailer/Fog Horn Audio Output Power 25 Watt @ 8 Ohm
      • Audio Distortion 5%
      • RF Output Power High 25 Watt / Low 1 Watt
      • Harmonic Emissions 0.25 µ W

    Command Mic Features:

    • Si-Tex MDA4CM SI-TEX Command Mic Kit
    • Applications: MDA-4 Fixed Mount DSC VHF Radio
    • Includes 6 Meter Cable with Bulkhead Connector

    Si-Tex MDA4GS SI-TEX GPS Smart Antenna
    Item #: 261611
  • Type: GNSS 66-channel Portable Smart GPS Antenna
  • Applications: MDA-4 Fixed Mount DSC VHF Radio
  • Plug n Play
  •  Include
    Reg. Price

    Sale Price

    Model #:

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