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AIS/VHF/FM Splitter 12db
Vesper Marine

AIS/VHF/FM Splitter 12db

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At last An Antenna Splitter with Gain Not Loss
Many AIS splitters introduce significant signal loss, some say no loss but this unique Vesper Marine splitter is the only one that provides signal gain - improving AIS reception and increasing range. This is because the Vesper Marine splitter has a built-in low noise amplifier. This is especially important to increase the receive range from the increasing number of low power AIS SART and MOB devices.

In addition to the amplification provided by this splitter, when used with your existing antenna you can optimize the range of your AIS transponder because the antenna is also mounted as high as possible.
Increases the performance of other manufacturer's AIS receivers and transponders too!
To simplify installation you can share an existing VHF antenna by using this splitter. The unit removes the need for a separate VHF antenna for an AIS receiver or transponder and allows a single antenna to be shared with a VHF radio.
This is an excellent solution when it is difficult to install an additional antenna or you wish to share an existing VHF antenna and maximize your AIS range.
This Vesper Marine splitter is specifically designed for use with both AIS receivers and transponders.
You can use this splitter with an existing antenna installation that is in good operating condition. However, for an optimized AIS and VHF antenna system, choose our AIS antenna designed to be shared with VHF radios.


  • AIS Sensitivity Gain - The SP160 provides amplification to the AIS signal resulting in much higher AIS sensitivity, improving AIS receive range.
  • Low power consumption - Very low power consumption designed to save your battery power.
  • Simple connections - No adapters or special patch cords needed for VHF/AIS. Uses standard PL-259 patch cables (two 2m (6.5ft) cables included).
  • Easy installation - Very compact and easy to install with built-in mounting flanges.
  • LED status indicators - 4 status LED's (power, VHF transmit, AIS transmit, antenna quality).
  • AM and FM radio connection - Provides AM/FM radio connection. An optional cable with a standard "Motorola plug" is available to make installation easy. Plugs directly into almost all car or marine stereos.
  • VHF-in-use indicator - VHF-in-use indicator appears on the screen of the AISWatchMate 850 and WatchMate Vision AIS transponders whenever the VHF radio is being used. This unique feature indicates when AIS traffic is delayed due to the antenna being in-use by the VHF radio and is also an excellent indicator if a stuck-mic condition exists.
  • Fail-safe VHF priority - VHF radio always has priority and the VHF can always transmit even if the power to the splitter fails.
  • Antenna quality monitor indicates if there is a problemThe unique antenna quality LED will indicate a problem with the antenna, cable or installation.
  • 12 or 24 Volt supply - Designed to work with either 12 or 24 volt supply.
  • Waterproof - IPx7 rated. High quality rugged construction made specifically for marine use.

  • High performance - The Vesper Marine SP160 Splitter has higher performance than any other AIS splitter, whether it's used with an AIS receiver or transponder. It’s also been designed to be used with other manufacturer's AIS receivers and transponders making it very versatile
  • One easy to install junction box - This new splitter provides a convenient and intelligent junction box for VHF, AIS and AM/FM break out points. Using the SP160 allows AIS transponders or AIS receivers to be easily installed with a single coaxial cable run to each device and only one cable to your shared VHF antenna.
  • Outstanding receive performance - The unique design of the SP160 means it doesn't have the signal loss associated with other AIS splitters ensuring you can achieve full performance from your VHF radio and your Vesper Marine WatchMate or XB-8000 (or other AIS receiver or transponder).
  • Improves AIS receive range - The SP160 improves AIS receive range by providing amplification to the AIS signal resulting in much higher AIS sensitivity - especially useful for receiving the growing number of 2W Class B AIS transceivers.

    Whats in the Box
  • AIS VHF antenna splitter
  • Installation guide
  • 2m (6.5') Power cable
  • Two 2m (6.5') PL259 patch cables


    Frequency Range 156MHz to 163MHz
    Operating temperature -25°C to +55°C (-13°F to 131°F)
    Environmental Watertight (USCG CFR-46, IPx7)
    Power Supply 10-32 VDC, <0.8W nominal
    Overall Size 135mm Long x 107 Wide x 56 Deep (5 5/16” x 4 1/4“ x 2 1/4”)
    (includes connectors)
    Maximum VHF power 25W
    Maximum AIS power 12.5W
    Compatibility Fully compatible with all Vesper Marine AIS transponders and receivers.
    Also compatible with other manufacturer's AIS receivers and
    transponders and will typically increase their performance.
    VHF & AIS Connectors SO-239 (UHF). Requires two appropriate length
    standard 50 ohm patch cables with PL-259 plugs
    (two 2m (6.5ft) cables included).
    AM / FM Connector BNC, optional 2m (6') cable available
    BNC to Motorola plug
    Patch Cable Two provided as standard. 2m (6.5ft) long 50 Ω cable
    with PL259 connectors.
    Insertion Loss VHF RX <1.5dB / VHF TX <1dB / AIS TX <1dB
    AIS Receive Gain 12dB
    AIS Sensitivity with Vesper
    Marine transponders
    -119 dBm, 6dB improvement

After ordering online, you will receive an automated email confirmation containing your order details. Your order will then be confirmed within a few minutes of placing your order.

It is our policy to ensure we deliver to our customers in a timely manner. In order to achieve this we use a range of freight companies depending on the size and weight of your order. In some instances we may use a number of carriers to get your products to you. For example, chain may come by road, some electronic equipment by air.

Most orders are shipped within 2 - 5 Days

Shipping rates

Orders delivered to Australian Post Codes under $499 attract an $18.00 shipping charge.

Orders of $499 or more ship free.*

For Remote areas and bulky items. If the cost to send is vastly different to our standard delivery costs, someone from our team will contact you prior to dispatch to arrange further payment or to issue a refund if you are not happy with the additional charges.

International orders will be charged at $0.00 initially and our staff will be in contact with a shipping quote. If the quote is not accepted the customer reserves the right to cancel their order and be refunded in full.

Should you have any queries or concerns about shipping, please don't hesitate to get in touch by clicking the support button on bottom right of the page.

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