GMR Fantom 24x Radar

Common issues

• Radome mounting bracket or bolts loosening from vibration over time
• Water ingress at the radome seal/gasket leading to internal condensation
• RF/data cable connector corrosion at the deck penetration
• False or ghost echoes from nearby metal structures, rigging, or radar interference
• Doppler target-trail colouring misread by inexperienced watchkeepers as a collision-avoidance solution rather than a trend indicator
• Firmware not kept current, causing display/chartplotter interface glitches
• Pedestal scan noise or intermittent rotation from bearing wear

Inspection checklist

• Radome mounting bracket and fasteners for corrosion/looseness
• Radome shell for UV degradation, cracking, or impact damage
• Cable gland and connector for corrosion or moisture ingress
• Power supply voltage at the unit against the maker's rated range
• Built-in self-test (BITE) result reviewed at start-up
• Doppler/trails function checked against a known moving target
• Firmware/software version checked against the latest release
• Heading line and bearing accuracy checked against a known reference (e.g. a charted object)

Service intervals

Critical spares

• Radome-to-pedestal gasket/seal kit
• RF/data cable assembly (radome to display/network unit)
• Mounting bracket hardware set
• Power supply cable/connector
• Display or network interface unit, if the radar feeds a shared multifunction display

Safety

• RF exposure near the radome face during transmission - keep clear per the maker's exposure distance guidance
• Fall hazard when working aloft at the radome mounting position
• Electrical isolation required before disconnecting cabling or opening the transceiver housing
• Radome location relative to the mast's lightning protection/bonding

Class survey

This is typically a leisure/workboat-grade radar and is not generally marketed with SOLAS/IMO type approval (wheelmark) for carriage-compliant navigation radar on classed commercial vessels - confirm type-approval status separately if carriage compliance is required. Where fitted as non-mandatory equipment, class interest is usually limited to power supply integration and a general operability check at survey.