Radar · Radar & ECDIS
The B&G / Navico 4G Mk2 is a marine radar system. It is normally installed on the bridge with scanner mounted high on a mast or radar platform. It is designed for target detection, collision-avoidance support and navigation in restricted visibility. The operating principle relies on radio-frequency transmission and echo processing to display target range and bearing. Compared with neighbouring models, the relevant differences are frequency band, antenna size, transmitter technology, display integration and tracking functions; these must be confirmed from the installed documentation rather than inferred from the model designation alone. Service and survey attention should concentrate on scanner rotation, target presentation, heading/speed inputs, antenna/RF path, alignment and power. For exact ratings, dimensions, tolerances, test limits and model-specific settings, refer to the manufacturer documentation for the exact figure.
What our service work and the manufacturer documentation say about keeping this model running.
Check scanner rotation, target detection, gain/clutter controls, heading and speed inputs, range/bearing alignment and known-target presentation where practicable. Inspect scanner, pedestal, RF path, seals and structural mounting. Verify performance-monitor functions where fitted, blind-sector information and bridge power supplies.
Carry fuses, selected cooling fans, display/control components, interface converters and manufacturer-recommended transmitter or scanner spares appropriate to the radar technology. Keep weather seals, RF connectors and approved maintenance consumables.
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