Simrad Halo Pulse Compression Radar

Click image for a larger view

Recommended For:

  • Coastal Fishing
  • Scientific Research
  • Commercial Fishing
  • Workboats
  • Fish Farming

Find Your Nearest Dealer


Simrad Halo Pulse Compression Radar

Recommended For:

  • Coastal Fishing
  • Scientific Research
  • Commercial Fishing
  • Workboats
  • Fish Farming

Ask Us a Question

Please fill in the short form below with your question, either about the Simrad Halo Pulse Compression Radar, or for some technical advice. Please include details of your vessel if you feel they will help us answer your query.

Thank you and we look forward to hearing from you!

Simrad Halo Pulse Compression Radar

Combining the best characteristics of traditional pulse and FMCW broadband radar systems, Simrad Halo™ Radar uses Pulse Compression technology to provide an unprecedented mix of long and short detection range, high target definition, and minimal clutter in an affordable package for commercial operators. Solid State technology means minimal warm-up time and maximum ocean-going reliability, while compliance with upcoming Low Emission standards makes Halo Radar safe to run in ports and harbours.

Solid-State with Pulse Compression Technology

Unlike traditional pulse radar, Halo Radar isn’t reliant on a high-powered magnetron (vacuum tube) to transmit. Instead, Halo Radar uses solid-state electronics and low-power 25W pulsed, frequency-swept transmission bursts to deliver pulse radar-like range and resolution, without the associated warm-up time, power consumption, or electromagnetic emissions. Solid-state electronics offer high reliability, without limited magnetron lifespan requiring regular replacement of a key radar component.

Dual Range Operation

With Dual Range, Halo Radar functions like two arrays in one – monitor two distance ranges simultaneously with independent displays, controls, and MARPA target tracking. Take full advantage of Halo Radar’s combination of short-, mid-, and long-range performance, with Pulse Compression technology meaning no compromises in detection at either range.

ARPA Target Tracking*

Track up to 10 user-selected radar targets, displaying CPA (closest point of approach) and TCPA (time to closest point of approach). Up to 20 different targets can be tracked in Dual Range mode, with 10 targets per screen. MARPA functionality requires a heading sensor and GPS.

Advanced Signal Processing

Halo Radar employs advanced signal processing for digital azimuth and range sidelobe reduction, enhancing discrimination of small targets such as channel markers from larger adjacent targets such as ships and bridges. In addition, Directional Sea Clutter Rejection dynamically changes gain in the sweep to allow smaller targets to be seen in the leeward. Coming soon via free NSS/NSO evo2 software update, Sector Blanking reduces on-screen clutter by eliminating unwanted reflections in up to four user-defined zones.

5 Usage Modes with Automatic Harbour/Offshore Selection

Custom, Harbour, Offshore, Weather and Bird-finder modes tune Halo Radar’s advanced signal processing to ensure targets of interest can be seen vividly – even in the toughest environmental conditions. Powerful bird-finder capabilities locate even small flocks from a distance, assisting commercial fishing fleets in efficiently locating productive waters. Automatic selection of Harbour and Offshore modes configures Halo Radar to suit current surroundings, while a ‘Custom’ mode enables manual tuning to suit any purpose or conditions.

High Speed Mode

Halo Pulse Compression Radar provides rapid position updates, with high speed operation up to 48RPM (mode and range dependent). Simrad quality construction and Halo Radar's brushless motor with advanced helical geartrain design ensure exceptionally quiet operation at all speeds.


Halo Radar’s solid-state technology is ready instantly from standby, and in just 16-25 seconds from power-on to fully-operational. Avoid the 2-3 minute warm-up time associated with traditional magnetron-based pulse radar, and know Halo Radar will produce an immediate, accurate radar image when required.

High Reliability

Halo Radar is built to last, with its solid-state transceiver meaning no magnetron to replace, and no manual tuning required as the magnetron heats up or ages. Similarly, a solid-state brushless motor driver means no motor brushes to wear out and replace. Halo Radar is designed to operate at high speed in winds up to 70 knots, and is rigorously tested to exceed IEC environmental, vibration and operational standards.

Low Electromagnetic Emissions

Unlike traditional pulse radar, Halo Radar’s low-power pulsed transmissions meet upcoming Low Emission standards for radar systems. With a minimum safe distance within the swing circle of its open array antenna, Halo Radar is safe to mount almost anywhere on board and to operate in close proximity to crew.

Low Power Consumption

Halo Radar uses 40W average with no wind, and no more than 150W at maximum wind velocity. In standby mode, power consumption is just 6.5W, versus 10-15W for pulse radar. Halo Radar’s low power consumption reduces operating costs, and its support for both 12 and 24 volt DC systems makes it ideal for smaller DC-power workboats as well as large craft.

Ethernet Connectivity

Simrad Halo Pulse Compression Radar connects to any Simrad NSS evo2 or NSO evo2 multifunction display system via Ethernet, with a bulkhead-mounted interface box below deck. Antenna installation is simple, using the same thin cable and small-diameter connectors as Simrad 3G and 4G Broadband radar systems. The maximum cable run from antenna to interface box is 30 metres / 98 ft (20 m / 65 ft cable supplied as standard), while Ethernet connectivity means extremely long cable runs are possible between interface box and display.

*MARPA functionality will not be available on Halo Radars at initial release and will be provided via a software update in Q3 2015.

Available Models


  • True 48nm range with 3-foot open array antenna


  • True 64nm range with 4-foot open array antenna


  • True 72nm range with 6-foot open array antenna