Garmin GMR 2534 xHD3
The Garmin GMR 2534 xHD3 is a traditional magnetron-based pulse open-array radar rated at 25kW of transmit power with a 4-foot antenna array, part of Garmin's xHD3 line that sits alongside (and above, in raw transmit power) the solid-state Fantom series for boats wanting maximum long-range detection performance, particularly in heavy rain or sea clutter where higher pulse power helps punch through interference. A longer antenna array produces a narrower horizontal beamwidth than a shorter one, which is what lets an open-array radar distinguish two closely-spaced targets (two nearby vessels, or a vessel close to a shoreline) that a wider-beam dome radar would blur into a single return.
With 25kW of power this unit can detect targets out to roughly 96 nautical miles, and it runs at selectable rotation speeds of 24 or 48 RPM depending on whether the priority is lower power draw or faster screen redraw for tracking fast-moving targets. Unlike solid-state Fantom radars, a magnetron-based xHD3 unit needs a brief warm-up period after power-on before it reaches full transmit power, a genuine practical trade-off against the Fantom line's instant-on convenience in exchange for the xHD3 line's higher raw pulse power. This class of radar is typically chosen for larger offshore or passage-making vessels - commercial fishing boats, larger cruisers, and passage-making motor yachts - where maximum raw detection range and penetration through weather take priority over the faster instant-on convenience of a solid-state radar, and it networks with a compatible Garmin chartplotter for display, overlay, and control rather than working as a standalone unit.
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Radar
- Technology: Magnetron pulse radar (xHD3 series)
- Power output: 25kW
- Antenna: 4-foot open array
- Detection range: up to 96 nautical miles
- Rotation speed: 24 RPM / 48 RPM
General
- Control: Networked via compatible Garmin chartplotter