Product Description
Shotgun Marine introducing the Simrad HALO™ Radar
A new innovation in Radar navigation. (Also Available in 4ft and 6ft antenna size)
Combining the best characteristics of our traditional pulse and 4G broadband radar systems, Simrad Halo™ Radar uses Pulse Compression technology to deliver an unprecedented mix of close and long range detection, precise target definition, and low clutter.
Solid state technology means minimal warmup time and maximum ocean-going reliability, while compliance with upcoming Low Emission standards makes Halo safe to run in anchorages and marinas.
Find your perfect balance between array size and range
Halo delivers long-range performance comparable to traditional pulse radar, plus unprecedented close range performance down to 6m (20ft) where once only our 3G/4G Broadband Radar could operate effectively.
Watch both nearby collision hazards and faraway weather cells, with Halo’s unique combination of short and long-range performance.
Halo Radar Features

- Beam Sharpening with Target Separation Control
- Compatible exclusively with Simrad NSS evo2 and NSO evo2 multifunction displays
- Dual Range operation
- Advanced signal processing with Custom, Harbour, Offshore, Weather, and BIRD modes
- High-speed 48RPM operation
- InstantOn™, ready in 16-25 seconds from power-on, instant from standby
- MARPA target tracking, up to 10 targets (20 with dual range)*
- Low electromagnetic emissions and radiation
- Low power consumption with 12/24V operation
- Ethernet connectivity
- Unique blue LED accent lighting with brightness control
5 Modes with Auto Harbour/Offshore Selection
Custom, Harbour, Offshore, Weather, and BIRD modes tune Halo Radar’s advanced signal processing to help ensure the targets you’re interested in can be seen vividly – even in the toughest environmental conditions. Automatic selection of Harbour and Offshore modes configures your Halo Radar to suit your surroundings, while a ‘Custom’ mode enables easy manual tuning to suit any purpose or condition.
Beam Sharpening with Target Separation Control
Go compact without compromising on resolution. Beam Sharpening grants HALO-3 similar resolution to a 4-foot array, and HALO-4 similar to a 6-foot array.
HALO-6 provides an unprecedented resolution of 0.8 degrees, similar to an 8-foot array.
Advanced Signal Processing for Clearer Images
Halo uses Digital Sidelobe Reduction and Directional Sea Clutter Rejection to enhance the detection and discrimination of smaller targets, while Sector Blanking eliminates unwanted reflections for less clutter on screen.
High Speed Mode for Rapid Position Updates
Halo provides high speed operation up to 48RPM (mode and range dependent). Simrad quality construction and Halo’s brushless motor with advanced helical geartrain design ensure exceptionally quiet operation, especially at high speed.
Dual Range with NSS & NSO evo2 Multifunction Displays
Monitor two distance ranges simultaneously with independent displays, controls, and MARPA tracking. Watch both nearby collision hazards and faraway weather cells, with Halo’s unique combination of short- and long-range performance.
MARPA Target Tracking with 10 Targets per Range*
Track CPA/TCPA for up to 10 user-selected radar targets per range (up to 20 total in dual-range mode), when using Halo Radar with a compatible multifunction display, high-speed heading sensor, and GPS receiver.
*MARPA functionality will not be available on Halo at initial release and will be provided via a software update in Q3 2015.

HALO™-3 Pulse Compression Radar
25W solid-state pulse compression radar with 3-foot open array antenna, 48nm range with Beam Sharpening.

HALO™-4 Pulse Compression Radar
Broadband 25W pulse compression radar with 4-foot open array antenna, 64nm range with Beam Sharpening.

HALO™-6 Pulse Compression Radar
25W solid-state pulse compression radar with 6-foot open array antenna, 72nm range with Beam Sharpening.
SPECIFICATIONS
Description | 25 W Halo® Pulse Compression Radar System. System consists of radar pedestal, antenna, 20 m (65 ft)Interconnection cable and RI-12 Interface Module. |
Type of emission | FCC/IC/R&TTE Type Certification. FCC ID: RAYHALO. IC ID: 4697A-HALO. R&TTE: Emissions compliant to SM1541-4 (including -40 dB/dec future design objectives) |
Environmental
Operating Temperature | -25°C to +55°C (-13°F - 131°F) |
Relative humidity | IEC60945 Exposed product |
Shock and Vibration | IEC60945 Exposed product and 20G, 100,000 cycle |
UV | IEC60945 Exposed product |
Waterproofing | IPX6 |
Relative wind velocity | 70 knots for 3’, 4’, and 6’ antenna at 48 rpm with RI-12 |
Power
Power consumption | 150 W (peak) at maximum wind velocity, 40 W (average) at zero wind velocity, 6.5 W (average) for Scanner + RI-12 in Standby mode |
DC input | R-12: 10.8 V DC to 31.2 V DC (12/24 volt systems), Pedestal voltage input is 36 V DC nominal generated by RI-12 |
Power up time | 16-25 seconds from POWER OFF to TRANSMIT |
Physical
Height | 448 mm (17.64”) |
Antenna swing circle diameter | 3 ft model: 1141 mm (3.5 ft), 4 ft model: 1431 mm (4.5 ft), 6 ft model: 2045 mm (6.5 ft) |
Component weights
Pedestal | 18.75 Kg (41.3lb) |
Antenna 3 ft | 4.1 Kg (9.0 lb |
Antenna 4 ft | 4.9 Kg (10.8 lb) |
Antenna 6 ft | 6.5 Kg (14.3 lb) |
RI-12 | 1.6 Kg ( 3.5 lb) |
10 m (33 ft) Cable | 1.1 Kg (2.4 lb) |
20 m (66 ft) Cable | 2.3 Kg (5.0 lb) |
30 m (100 ft) Cable | 3.4 Kg (7.5 lb) |
Antenna
Instrumented range | 3 ft model:48 nm, 4 ft model:64 nm, 6 ft model:72 nm |
Transmitter | Solid state module with no long term transmitter power degradation |
Rotation | Approx. 24 to 48 rpm (Min 20 rpm at Max 70 kts). Software controlled in modes |
Beam width | 3 ft: 2.4°+/-10% (-3 dB width) – 1.7 deg with Beam sharpening mode ON,4 ft: 1.8°+/-10% (-3 dB width) – 1.3 deg with Beam sharpening mode ON,6 ft 1.2°+/-10% (-3 dB width)- 0.8 deg with Beam sharpening mode ON |
Beam width Vertical | 25° +/-20 % (-3 dB width) |
Plane of polarization | Horizontal Polarization |
Sidelobe level 3 ft | Below -23 dB max. (within ±10°): Below –30 dB max. (outside ±10°) |
Side lobe level 4 ft | Below -23 dB max. (within ±10°):Below –30dB max. (outside ±10°) |
Side lobe level 6 ft | Below -23 dB max. (within ±10°): Below –30 dB max. (outside ±10°) |
Transmitter frequency | Synthesized - Upper half of X-Band 9.410 - 9.495 GHz |
Peak power output | 25 W ± 10% under any transmit condition – up to 10% duty cycle max |
Pulse length/PRF and Compression ratio | Pulse length: 0.04 usec: Chirp length:2-96 usec: Chirp Bandwidth: 2-32 MHz: Up to 1 pulse and 5 chirps in a burst with burst repetition rate of 500-2000. Range and mode dependent. Effective Pulse Compression Ratio less than 150 in all modes. |
SART/RACON Triggering | Yes – trigger distance: about 1nm max – weather, sea state, and SART position dependent |
Duplexer | Circulator and isolator |
Mixer | MIC front-end |
IF section | Center frequency: 28.625 MHz: Bandwidth: 40 MHz max.* A/D; 16 bit 115 MSPS *Narrower bandwidths defined by signal processing |
Noise figure | 5 dB (Average) at front-end input. |
Other
Communications Ports | Ethernet 10/100 Base-T for radar data and control, Micro-C male / NMEA2000 via RI-12 |
NMEA2000 PGNS USED | 127250 - Vessel Heading, 127251 - Rate of Turn, 129025 - Position, Rapid Update, 129026 - COG & SOG, Rapid Update, 129029 - GNSS Position Data, 130818 -Proprietary |
NMEA-0183 | Input via RI-12: Sentenses used by the radar application. HDG, HDT, HDM, GGA, GLL, RMC, VTG.:Baud rate: Auto sense 4800, 9600, 19200 or 38400 |
Antenna park | yes |
Remote power on | yes |
Motor | Brushless with solid state commutation with electromagnetic braking for parking. |
Inter-connecting cable | Uses the same cable as the 3G/4G radars. Available in: 10 m (33 ft), 20 m (66 ft), 30 m (100 ft) lengths. Ships with (20 m (66 ft) Max length 30 m (100 ft). Options for cable to exit from rear of pedestal or pole mount |
COMES WITH
![]() | PEDESTAL, RADAR, HALO | PEDESTAL, RADAR, HALO 000-11463-001 |
![]() | RI-12 IF BOX, RADAR, HALO, | RI-12 Radar interface module for Halo Radar 000-11467-001 |
![]() | Scanner cable 20 m (66 ft) | 3G/4G Scanner connection cable - 20 m (66 ft) AA010212 |
![]() | ANTENNA, RADAR, HALO, 6FT | ANTENNA, RADAR, HALO, 6FT
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