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The Raymarine RD418HD is a compact 4kW high-definition digital radar dome. Utilizing a traditional magnetron transmitter paired with advanced HD Color digital signal processing, it offers double the maximum range scale (up to 48 nm) of solid-state models.
Key features include Bird Mode (which automatically optimizes receiver gains to track flocks of feeding sea birds) and High-Speed Mode (48 RPM rotation rate for rapid target updates at short range).
| Feature | Specification |
| Model Code | RD418HD |
| Transmitter Type | Solid-state modulator driving a traditional Magnetron |
| Peak Power Output | 4.0 kW (nominal) |
| Maximum Range Scale | 48 Nautical Miles (nm) |
| Beamwidth (Nominal) | 4.9° Horizontal / 25° Vertical |
| Rotation Rate | 24 RPM nominal / 48 RPM high-speed mode (automatically engages under 3 nm) |
| Input Voltage | 12V / 24V DC nominal (10.8V to 33V DC absolute range) |
| Power Consumption | 60W active / 25W standby |
| Networking Protocol | SeaTalkhs / Ethernet (RayNet connection infrastructure) |
| Waterproofing | IPX6 |
| Weight | 9.5 kg (21.0 lbs) |
| Dimensions | Diameter: 521 mm (20.5 in) | Height: 247 mm (9.7 in) |
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