Simrad HALO20 Marine Radar – 20-Inch Dome With Pulse Compression is a compact, solid-state radar designed to improve situational awareness and target detection aboard small powerboats, sportfishing boats, dayboats, and coastal cruising vessels. It uses advanced pulse compression technology to detect nearby collision hazards while providing a maximum range of up to 24 nautical miles. Its combination of close-range visibility and short-to-medium-range coverage helps boat operators monitor vessels, navigation markers, shorelines, and weather activity around the boat.

The HALO20 uses a 10 W solid-state transmitter rather than a traditional magnetron. Simrad’s InstantOn™ technology allows the radar to become ready within seconds of being switched on and wake immediately from its low-power standby mode. This is particularly useful when radar coverage is needed quickly while approaching a harbour, navigating a busy channel or encountering reduced visibility. Pulse compression processing provides clear target definition with minimal screen clutter, helping the operator interpret the surrounding marine environment more easily.

This boat radar is housed within a low-profile 20-inch dome measuring approximately 510 mm in diameter and 223 mm high. The dome weighs approximately 5.9 kg without its cable, making it suitable for installations where available mounting space and equipment weight must be considered. It operates from a 10.5–31.2 V DC supply, supporting both 12 V and 24 V marine electrical systems. Typical power consumption is approximately 18 W, with a maximum consumption of 20 W, and the recommended fuse rating is 5 A. The IPX6-rated enclosure is designed for exposed marine installation, subject to installation requirements stated in the manufacturer’s manual.

Harbour, Offshore, and Weather operating modes automatically adjust the radar’s signal processing for common boating conditions. Harbour mode is intended for busy coastal areas and marinas, Offshore mode supports open-water navigation, and Weather mode helps display rain and weather-related returns. Custom mode also allows operating preferences to be configured for specific situations. Guard Zones can be established around selected areas so the system can alert the operator when a radar target enters the monitored zone.

The HALO20 also supports MARPA target tracking when connected to a compatible display and the required heading information. It can track up to 10 selected MARPA targets, or up to 20 when Dual Range operation is used. Dual Range allows two radar ranges to be displayed simultaneously, helping the operator watch nearby traffic while also monitoring targets farther from the vessel. Rotation speed is 20–24 RPM, depending on the operating mode and connected multifunction display.

This marine radar communicates through a 100Base-T Ethernet connection and is intended to work with compatible Simrad multifunction displays. Installation should provide the correct power supply, radar mounting position, interconnection cable, and heading data required for any dependent functions. Buyers should confirm display compatibility and package contents before ordering, particularly when integrating the radar into an existing navigation network.

With its compact dome, low electrical demand and practical collision-awareness tools, the HALO20 is a useful radar for boats operating around coastlines, channels, harbours and open water. Full manufacturer information, installation documents and current compatibility details are available on the official Simrad HALO20 product page.

Key Features:

• Simrad HALO20 Marine Radar – 20-Inch Dome With Pulse Compression combines short-range target visibility with radar coverage extending up to 24 nautical miles.
• Compact 510 mm diameter × 223 mm high dome with a low-profile design suitable for smaller vessels.
• Solid-state 10 W pulse compression radar technology provides clear target definition with minimal clutter.
• InstantOn™ enables immediate operation from standby and start-up within seconds from a powered-down state.
• Dual Range operation allows near and farther radar ranges to be monitored simultaneously.
• MARPA functionality supports tracking of up to 10 selected targets, or up to 20 in Dual Range mode.
• Harbour, Offshore, Weather and Custom operating modes help optimise the radar display for different marine conditions.
• Guard Zones help monitor defined areas around the vessel for approaching radar targets.
• Operates on 10.5–31.2 V DC and supports 12 V and 24 V marine electrical systems.
• IPX6-rated dome enclosure and typical power consumption of approximately 18 W.
• 100Base-T Ethernet connection supports integration with compatible Simrad multifunction displays.

Applications / Suitable For:

• Simrad HALO20 Marine Radar – 20-Inch Dome With Pulse Compression is suitable for improving situational awareness aboard small powerboats, dayboats, sportfishing vessels and coastal cruising boats.
• Detecting vessels, navigation markers, shorelines and other radar-reflective targets during daytime or nighttime operation.
• Supporting navigation through harbours, marinas, coastal channels and busy waterways.
• Monitoring surrounding targets when visibility is reduced by darkness, rain, haze or fog.
• Watching nearby traffic and more distant targets simultaneously through Dual Range operation.
• Supporting collision-risk assessment using MARPA tracking when the required display and heading data are available.

FAQs:

Q: What is the maximum range of the Simrad HALO20 Marine Radar – 20-Inch Dome With Pulse Compression?
A: The HALO20 has a confirmed maximum radar range of 24 nautical miles and provides close-range detection from approximately 6 metres.

Q: Does the Simrad HALO20 include VelocityTrack™ or 60 RPM operation?
A: No. VelocityTrack™ Doppler technology and 60 RPM close-range operation are features of the HALO20+, not the standard HALO20 with part number 000-14537-001.

Q: Can the HALO20 operate with both 12 V and 24 V boat systems?
A: Yes. It accepts a 10.5–31.2 V DC supply, making it suitable for properly configured 12 V and 24 V marine electrical systems.

Q: Does the HALO20 work as a standalone radar display?
A: No. The radar dome must be connected to a compatible Simrad multifunction display. Some functions, including MARPA tracking, also require suitable heading information.