Overview

The Simrad HALO20 radar dome is a 20-inch pulse compression radar offered in HALO20 and HALO20+ configurations, supplied as a dome scanner kit with a 10 m cable. Both options run on 12/24 V systems (10.5 to 31.2 VDC) and are rated IPX6 for real-world spray and washdowns on deck.

This is the style of radar many owners choose when they want solid short-to-mid range awareness without moving up to a larger open array. Dual Range lets you watch close-in targets while keeping a longer-range view up for weather or traffic, and MARPA tracking helps keep tabs on selected contacts when you are working through busy channels or limited visibility.

Key features

• 20-inch radome footprint (510 mm diameter, 223 mm high) that fits common hardtop, arch, and mast mounting locations
• Pulse compression radar technology in both variants, with Dual Range capability
• Maximum range depends on variant: up to 24 NM (HALO20) or up to 36 NM (HALO20+)
• 12/24 V compatible supply (10.5 to 31.2 VDC) with a recommended 5 A fuse
• IPX6 water resistance for exposed mounting positions and routine washdowns
• Instant wake from low-power standby for quick use after leaving the dock or when conditions change
• MARPA target tracking supports up to 10 targets (up to 20 in Dual Range)
• HALO20+ includes VelocityTrack Doppler and supports up to 60 RPM rotation at ranges up to 1.5 NM for faster close-range updates

Variants

This product is offered in two configurations that share the same 20-inch dome format and core radar features.

The main differences are maximum range and close-range behavior: HALO20 runs out to 24 NM, while HALO20+ extends to 36 NM and adds VelocityTrack Doppler with range-dependent rotation up to 60 RPM for near-instant updates at close ranges. Both support Dual Range, MARPA tracking, 12/24 V power (10.5 to 31.2 VDC), and an IPX6-rated housing.

• 000-14536-001: Type HALO20+. Up to 36 NM maximum range with VelocityTrack Doppler and rotation up to 60 RPM at ranges up to 1.5 NM, which is useful when you want rapid target updates in tight traffic.
• 000-14537-001: Type HALO20. Up to 24 NM maximum range with 24 RPM rotation, a straightforward option for coastal navigation, harbor work, and routine visibility support.

What’s included

• 20-inch radar dome scanner
• 10 m cable for HALO dome radar
• Ethernet adapter cable (RJ45 to 5-pin, 1.5 m)

Installation and setup

Plan the mount so the dome has a clear view around the boat and sits as level as practical at the normal running trim. Avoid placing it directly behind tall rails, thick canvas, or other antennas that can shadow targets, and leave room to route the cable without tight bends or chafe points.

On smaller boats, the dome commonly goes on a hardtop, radar arch, or a mast bracket. On sailboats, pay attention to rigging and spreaders that can block sectors, and keep the scanner far enough from crew areas that you are not running it continuously right at head height.

Electrical and system integration

Power the radar from a clean 12/24 V source (10.5 to 31.2 VDC) and protect the feed with the recommended 5 A fuse. Maximum draw is 20 W for HALO20 and 29 W for HALO20+, with typical consumption around 18 W and 20 W respectively, so most boats can support it without heavy-gauge runs, but a dedicated breaker makes troubleshooting easier.

Radar display and control are handled through compatible Simrad multifunction displays. Confirm your MFD supports HALO dome radars and has an available Ethernet connection path before purchase, especially if you are integrating into an older networked setup.

Use on board

This dome radar is a good match for skippers who do early-morning departures, run in haze or rain, or routinely work around traffic where quick target separation matters. The HALO20+ variant leans toward situations where you want faster close-range refresh and Doppler target cues, while HALO20 covers the same form factor with a shorter maximum range.

Maintenance and care

Rinse salt off the radome and mounting hardware with fresh water, and avoid abrasive pads or harsh solvents on the dome surface. Periodically check fasteners, cable glands, and the cable run for chafe so vibration and UV exposure do not create an intermittent connection later in the season.