Furuno DRS4W – 1st Watch Wireless Radar Antenna

Description

Bring a simple radar view to an iPad or iPhone with the Furuno DRS4W 1st Watch Wireless Radar Antenna. The 19-inch magnetron radome creates its own Wi-Fi connection, allowing boaters to use a compatible iOS device as the radar display for basic coastal awareness, harbor approaches, and nighttime boating. Need radar without installing a dedicated MFD? The DRS4W provides 4 kW output, up to 36 NM range scales, and 24 RPM scanning in a compact wireless radome.

Key Specifications

• Furuno DRS4W 1st Watch wireless magnetron radar antenna.
• 19-inch enclosed radome designed for compatible iPad and iPhone use.
• 4 kW peak magnetron radar output.
• Up to 36 NM instrumented range and approximately 25 m minimum range.
• 7.2° horizontal and 25° vertical beamwidth.
• 24 RPM scanner rotation speed.
• Wi-Fi connection to compatible iOS devices through the Furuno 1st Watch app.
• Does not support MARPA/ARPA, Doppler target coloring, or dual-range operation.
• 12V/24V DC input, approximately 24W operating draw, 10W standby draw, IPX6 protection, and 70-knot wind rating.
• Approximate radome weight: 12.5 lb (5.7 kg).

Integration

The DRS4W uses Wi-Fi and a compatible iPad or iPhone rather than a conventional MFD network. It is not a chartplotter, GPS receiver, AIS display, or radar-overlay system. A compatible iOS device, the required Furuno application, vessel power, and an appropriate radome mount are needed for operation.

The 36 NM figure is an instrumented range, not guaranteed target detection. Actual results vary with radome height, target size, weather, rain, sea state, clutter, radar settings, and installation quality. Wi-Fi range and reliability also depend on device location, interference, obstructions, and onboard wireless traffic.

Installation Notes

Mount the radome on a rigid, level surface with clear rotation and minimal obstruction from antennas, lights, rigging, masts, exhaust, and deck structures. Keep the radar clear of personnel and follow Furuno safe-distance guidance. Route power wiring through protected paths away from heat, chafe, standing water, high-current wiring, and moving equipment.

Use correct circuit protection and test Wi-Fi reception at the helm before finalizing installation. Keep the iOS display device secured and charged while underway. Radar is a navigation aid and does not replace a proper lookout, charts, navigation lights, safe speed, or navigation-rule compliance.

Before Ordering

Confirm iPad/iPhone compatibility, app availability, Wi-Fi signal path, 12V/24V power supply, radome mounting space, clear scanner rotation, cable routing, and whether the system’s basic wireless radar functions suit the vessel’s navigation needs before ordering.