Furuno DRS4W 1st Watch Wireless WiFi Radar Dome
Furuno DRS4W 1st Watch Wireless WiFi Radar Dome — Product description
The Furuno DRS4W 1st Watch Wireless WiFi Dome - No Cable (MPN DRS4W-DOME, UPC 00611679359742) is the world's first wireless marine radar dome - displays directly to your iOS or Android smartphone / tablet over WiFi without requiring a dedicated chartplotter or MFD. The DRS4W eliminates the traditional radar install constraint where the radar dome must be wired to a fixed-mount display at the helm position. Instead, the radar broadcasts its data over WiFi to any compatible mobile device on the boat - your phone in your pocket becomes the radar display. Practical impact: full radar situational awareness from anywhere on the boat, not just from the helm. Walk to the bow to check a target visually, the radar display stays on your phone. Step into the cabin to grab gear, the radar display stays with you. The 19-inch radome with 4 kW transmit power delivers practical detection range of 0.125 to 24 nautical miles - the standard marine radar performance envelope for collision avoidance, weather tracking, and coastline identification. 24 RPM antenna rotation speed. 7.2-degree horizontal beam width and 25-degree vertical beam width. 12-24V DC input voltage tolerance (works on both 12V and 24V boat electrical systems). IP26 waterproof rating - withstands wave wash and direct rain. Dome dimensions: 19.2 inch diameter x 8.6 inch height - the compact recreational radar size sized for boats 22-40 ft where the larger open-array radars would be excessive. Install is dramatically simpler than traditional wired radars - no display cable to route from the radome to the helm, no chartplotter / MFD installation required, just power and the radome. For boats that don't have or don't want a dedicated chartplotter, the DRS4W brings serious marine radar capability without the chartplotter cost or install complexity. For boats with existing chartplotters, the DRS4W complements rather than replaces - the wireless display lets crew members beyond the helm operator share radar situational awareness on their personal devices. Compatible with Furuno's 1st Watch app (free download for iOS and Android). 3-year limited warranty. THIS PRODUCT IS THE DOME ONLY - NO power / data cable included. Order the appropriate Furuno cable separately for your install.
The Furuno DRS4W 1st Watch Wireless WiFi Dome - No Cable is the world's first wireless marine radar dome. It displays directly to your iOS or Android smartphone or tablet over WiFi, without requiring a dedicated chartplotter or MFD. It's a unique product category that solves a real problem in marine radar installation and operation.
What makes wireless radar different. Traditional marine radar installation requires running a data cable from the radar dome (mounted high on a tower, arch, or hardtop) to a fixed display at the helm position. The cable run is one of the more complex parts of any radar install - often requiring drilling through bulkheads, routing through tight spaces, and connecting at both ends. The fixed-display constraint also limits where you can use the radar - the display only works at the helm position. The DRS4W breaks both constraints. The radar broadcasts its data over WiFi to any compatible mobile device on the boat - your phone in your pocket becomes the radar display. No display cable to route. No fixed helm position constraint. Full radar situational awareness from anywhere on the boat.
Practical use cases. Several practical scenarios benefit from wireless radar: (1) Boats without chartplotters - smaller fishing boats, recreational craft, sailboats where the owner doesn't want to install or pay for a dedicated chartplotter / MFD. The DRS4W brings serious marine radar capability without the chartplotter cost or install complexity. (2) Crew situational awareness - on a larger boat with multiple people aboard, each person can run the DRS4W display on their own phone. The driver has radar at the helm chartplotter. the lookout has radar on their phone in the cockpit. the cabin crew has radar on their tablet below. Everyone shares the same situational picture. (3) Mobility during operation - walk to the bow to investigate a visual target, the radar display goes with you. Step into the cabin to grab gear, the radar display follows. Critical for solo operators who can't be tied to the helm during navigation. (4) Retrofit on older boats - install the DRS4W on a boat that lacks the helm space or wiring infrastructure for a traditional chartplotter / radar install.
4 kW transmit power. The DRS4W transmits at 4 kW peak power - the standard recreational marine radar power class. Practical detection range: 0.125 nautical miles (about 760 feet) at minimum to 24 nautical miles at maximum. The minimum range capability matters as much as the maximum - good short-range detection lets you see boats, buoys, and obstacles in close-quarters situations (entering marinas, navigating channels, avoiding nearby vessels). Maximum range covers practical situational awareness needs - 24 NM is enough to see weather cells approaching from significant distance and to identify large vessels well before they're close.
19-inch dome size. The 19.2-inch diameter, 8.6-inch height dome is the compact recreational radar size - sized for boats 22-40 ft where larger open-array radars would be excessive. Open-array radars (the rotating bar antenna on larger commercial vessels) deliver better target discrimination at long range but require more mounting height and physical presence. Dome radars are the standard for typical recreational boats - compact enough to fit on a tower, arch, or hardtop without dominating the boat's silhouette. The DRS4W's 19-inch size is at the larger end of the dome category, delivering modest target discrimination improvement over smaller 18-inch domes.
24 RPM antenna rotation. The antenna rotates at 24 RPM - faster than the typical 20 RPM of competing recreational radars. Practical impact: radar display updates faster, showing target motion more smoothly. Particularly meaningful when tracking fast-moving targets (other boats, weather cells) where slower-updating radars can show jerky motion that's harder to interpret.
12-24V dual voltage. The DRS4W accepts 12V or 24V DC input - works on both 12V boat electrical systems (typical recreational) and 24V systems (typical larger boats and commercial vessels) without modification. Auto-detects the input voltage and adjusts internally. Practical benefit: one radar SKU works for both voltage systems, no voltage-specific variants to stock or order.
IP26 waterproof. The radome is IP26 rated - withstands powerful jets of water from any direction and direct rain. Practical translation: survives heavy rain, wave wash over the bow, and the typical marine wet conditions without water intrusion. The IP26 rating is sufficient for the typical mast-top installation where the radome is exposed to all weather conditions year-round.
The 1st Watch app. The DRS4W communicates with mobile devices via the Furuno 1st Watch app (free download for iOS and Android). App features: radar display with adjustable range, gain, and sea/rain clutter controls. North-up / heading-up display orientation. Target trail display for tracking moving targets. Standard radar features that match what you'd see on a dedicated chartplotter radar display - just on your phone or tablet. The app is optimized for marine use with high-contrast display modes for sunlight readability.
WiFi range and coverage. The DRS4W creates its own WiFi access point - your mobile devices connect to the DRS4W's WiFi network just like connecting to any other WiFi network. Practical range: covers the typical recreational boat from bow to stern. For larger boats where WiFi range from a single access point might be marginal at extreme positions, the DRS4W's WiFi signal is strong enough for most 30-40 ft boats. For very large boats (50+ ft), a WiFi range extender may be needed for coverage at extreme positions.
Multiple device support. Multiple mobile devices can connect to the DRS4W simultaneously - the entire crew can run the radar display at the same time on their personal phones / tablets. No single-display limitation. Critical for boats where multiple people benefit from shared situational awareness during navigation.
What's NOT included. THIS PRODUCT IS THE DOME ONLY - NO power / data cable included. The dome ships with the radome assembly and mounting hardware, but you must order the appropriate Furuno cable separately for your install. The cable kits are sold separately based on the cable run length you need - measure the distance from your planned dome mounting position to your power source before ordering. Also not included: mobile devices (you supply iOS or Android phones / tablets), mounting bracket for tower or arch installation (use the Furuno tower bracket sized for the DRS4W), and the 1st Watch app (free download from the app stores).
Install. Plan for 3-5 hours for an experienced installer. Tasks: (1) Install a suitable mounting platform for the radome - typically a tower, arch, or hardtop with sufficient height for radar coverage. The radome needs unobstructed 360-degree rotation. (2) Mount the radome on the mounting platform using the supplied bracket and stainless hardware. (3) Run the radome cable (sold separately) from the radome down to the boat's 12V or 24V electrical system. (4) Wire through an appropriately-sized fuse (typically 15A for the radar). (5) Power on the radome and configure WiFi network credentials per the included instructions. (6) Install the Furuno 1st Watch app on your iOS or Android devices. (7) Connect devices to the DRS4W WiFi and test radar operation.
Warranty. Furuno 3-year limited warranty applies. Save the receipt and the original packaging. Warranty service runs through Furuno's authorized service network worldwide. Most field failures Furuno sees in the DRS4W line are install-related (improper mounting causing vibration damage, undersized power wiring causing brown-outs, cable installation issues) rather than radar defects - careful install delivers many years of reliable service.
Key Features
- Furuno DRS4W 1st Watch Wireless Marine Radar Dome
- World's first wireless WiFi marine radar dome
- Displays directly to iOS / Android smartphones and tablets
- No dedicated chartplotter or MFD required
- Full radar situational awareness from anywhere on the boat
- Multiple devices can connect simultaneously
- 19-inch radome (compact recreational radar size)
- 4 kW peak transmit power
- Detection range: 0.125 to 24 nautical miles
- 24 RPM antenna rotation (faster than typical 20 RPM)
- 7.2-degree horizontal beam width
- 25-degree vertical beam width
- 12-24V dual voltage input (auto-detect)
- IP26 waterproof rating
- Dome dimensions: 19.2 in diameter x 8.6 in height
- 30 lb shipping weight
- Sized for boats 22-40 ft
- For boats without chartplotters or as supplementary radar
- For shared crew situational awareness across multiple devices
- For mobile operation when walking around the boat
- For older boats lacking helm space / wiring for traditional chartplotter
- Furuno 1st Watch app (free download for iOS and Android)
- App features: range / gain / clutter controls, target trails, multiple orientations
- Built-in WiFi access point (typical 30-40 ft boat coverage)
- WiFi range extender may be needed for very large boats (50+ ft)
- THIS IS DOME ONLY - NO power / data cable included
- Cable sold separately based on run length needed
- Mounting bracket NOT included
- Recommended fuse: 15 amps
- 3-year Furuno limited warranty
- Manufacturer Part Number DRS4W-DOME / UPC 00611679359742
Why Buy from NVN Marine
- Authorized Furuno reseller, full manufacturer warranty
- NMEA member and ABYC certified, advice from real boat techs
- Same-day shipping before 3 PM ET on in-stock items
- NY headquarters and Fort Lauderdale flagship retail store
Technical specifications
| Title | Furuno DRS4W 1st Watch Wireless WiFi Marine Radar Dome (No Cable) - 19 Inch, 4 kW, iOS / Android Display |
|---|---|
| Brand | Furuno |
| Manufacturer Part Number | DRS4W-DOME |
| UPC | 00611679359742 |
| Series | DRS4W 1st Watch |
| Configuration | Dome only - NO power / data cable included |
| Type | Wireless WiFi marine radar dome |
| Display | iOS / Android smartphone or tablet via Furuno 1st Watch app |
| Chartplotter Required | NO |
| Dome Size | 19 inches |
| Dome Dimensions | 19.2 in diameter x 8.6 in height |
| Transmit Power | 4 kW peak |
| Detection Range | 0.125 to 24 nautical miles |
| Antenna Rotation | 24 RPM |
| Horizontal Beam Width | 7.2 degrees |
| Vertical Beam Width | 25 degrees |
| Input Voltage | 12-24V DC (dual voltage, auto-detect) |
| Recommended Fuse | 15 amps |
| Waterproof Rating | IP26 |
| Color | White |
| WiFi | Built-in WiFi access point |
| Multiple Device Support | Yes (simultaneous connections) |
| App | Furuno 1st Watch (free iOS / Android download) |
| Recommended Boat Size | 22-40 ft |
| Cable | NOT INCLUDED (sold separately by run length) |
| Mounting Bracket | NOT INCLUDED (sold separately) |
| Shipping Weight | 30 lb |
| Warranty | Furuno 3-year limited |
Frequently asked questions
What's wireless radar and why does it matter?
Traditional marine radar installation requires running a data cable from the radar dome to a fixed display at the helm position - the cable run is one of the more complex parts of any radar install, and the fixed-display constraint limits where you can use the radar. The DRS4W breaks both constraints. The radar broadcasts its data over WiFi to any compatible mobile device on the boat - your phone in your pocket becomes the radar display. No display cable to route. No fixed helm position constraint. Full radar situational awareness from anywhere on the boat.
What boat size does this fit?
22-40 ft is the appropriate size range for the 19-inch dome. Open-array radars (the rotating bar antenna on larger commercial vessels) deliver better target discrimination at long range but require more mounting height and physical presence - typical for boats over 40 ft. The DRS4W's 19-inch dome is the compact recreational size - fits on a tower, arch, or hardtop without dominating the boat's silhouette. For boats over 40 ft, Furuno offers open-array radars with higher power and better long-range discrimination.
Do I need a chartplotter?
NO - that's the whole point of the DRS4W. The wireless WiFi design eliminates the traditional requirement for a dedicated chartplotter or MFD. The radar displays directly on your iOS or Android phone or tablet via the free Furuno 1st Watch app. For boats that don't have or don't want a dedicated chartplotter, the DRS4W brings serious marine radar capability without the chartplotter cost or install complexity. For boats with existing chartplotters, the DRS4W complements rather than replaces - the wireless display lets crew members beyond the helm operator share radar situational awareness on their personal devices.
Is the cable included?
NO - THIS PRODUCT IS THE DOME ONLY. The dome ships with the radome assembly and mounting hardware, but the power / data cable is sold separately. You must order the appropriate Furuno cable based on your install's run length - measure the distance from your planned dome mounting position to your power source before ordering. Furuno offers cable kits in standard lengths. The cable run is typically the radome at the top of a tower / arch down to the boat's 12V or 24V electrical system - typical cable runs are 15-50 feet depending on the boat layout.
What's the actual range?
Detection range is 0.125 nautical miles (about 760 feet) at minimum to 24 nautical miles at maximum. The minimum range matters as much as the maximum - good short-range detection lets you see boats, buoys, and obstacles in close-quarters situations (entering marinas, navigating channels, avoiding nearby vessels). Maximum range covers practical situational awareness needs - 24 NM is enough to see weather cells approaching from significant distance and to identify large vessels well before they're close. Effective range in practice depends on target size, weather conditions, and mounting height of the dome.
What's the WiFi range from the dome?
The DRS4W creates its own WiFi access point - your mobile devices connect to the DRS4W's WiFi network just like connecting to any other WiFi network. Practical range: covers the typical recreational boat from bow to stern. For larger boats (40+ ft) where WiFi range from a single access point might be marginal at extreme positions, the DRS4W's signal is usually adequate but not always. For very large boats (50+ ft), a WiFi range extender may be needed for coverage at extreme positions. For typical 22-40 ft recreational boats, single access point coverage works throughout the boat.
Can multiple devices connect at once?
Yes - multiple mobile devices can connect to the DRS4W simultaneously and run the radar display at the same time on their personal phones / tablets. No single-display limitation. Practical use case: on a boat with multiple people aboard, the driver has radar at the helm chartplotter (if applicable), the lookout has radar on their phone in the cockpit, the cabin crew has radar on their tablet below. Everyone shares the same situational picture from their own device. Critical for shared crew situational awareness during navigation.
What's the install like?
Plan for 3-5 hours for an experienced installer. Tasks: install a suitable mounting platform for the radome (typically a tower, arch, or hardtop with sufficient height for radar coverage), mount the radome with the supplied bracket and stainless hardware, run the radome cable (sold separately) from the radome down to the boat's 12V or 24V electrical system, wire through a 15A fuse, power on and configure WiFi network credentials, install the Furuno 1st Watch app on your iOS or Android devices, connect devices to the DRS4W WiFi and test radar operation.
Does it work with both 12V and 24V boats?
Yes - the DRS4W accepts 12V or 24V DC input. Works on both 12V boat electrical systems (typical recreational boats) and 24V systems (typical larger boats and commercial vessels) without modification. Auto-detects the input voltage and adjusts internally. Practical benefit: one radar SKU works for both voltage systems, no voltage-specific variants to stock or order. For boats with mixed voltage systems, wire to whichever voltage source is most accessible.
Where should I mount the dome?
Mount the dome at the highest practical point on the boat consistent with safety - typically a tower (sportfisher tower, T-top, hardtop), an arch (radar arch on bay boats or cruisers), or the cabin top (for boats without towers). Higher mounting position increases practical radar range. The dome needs unobstructed rotation in all 360 degrees - no overhead structure blocking the radar beam. Position the dome at least 3 feet above the operator's eye level to prevent direct radar exposure to crew during operation. Use the appropriate mounting bracket sized for the DRS4W (sold separately).
What happens if my phone runs out of battery?
The radar continues operating normally - the DRS4W is fully functional without any specific mobile device connected. When your phone runs out, connect a different device to the DRS4W WiFi and resume operation, or keep charging cables available at the helm. For voyages where battery life is a concern, plan accordingly: use a USB power bank or vehicle-style charger to keep at least one device charged for radar duty. The Furuno 1st Watch app doesn't drain phone battery faster than other navigation apps - typical phone battery handles many hours of radar display before requiring charge.
What's the warranty?
Furuno 3-year limited warranty applies. Save the receipt and the original packaging. Warranty service runs through Furuno's authorized service network worldwide. Most field failures Furuno sees in the DRS4W line are install-related (improper mounting causing vibration damage, undersized power wiring causing brown-outs, cable installation issues) rather than radar defects - careful install delivers many years of reliable service. Furuno marine electronics have excellent field reliability across decades of production.
