The Lilley & Gillie TrueCourse is a high-precision heading repeater manufactured by John Lilley & Gillie Ltd. in the United Kingdom. Specifically designed to display True Heading derived from a master gyrocompass, satellite compass, or Transmit Heading Device (THD), the TrueCourse repeater provides bridge officers and helmsmen with a highly visible, real-time heading reference on the bridge.

Engineered for seamless integration into modern bridge navigation networks, the TrueCourse processes standard NMEA 0183 serial heading data ($HEHDT, $THS). Featuring a clear 360-degree compass card with high-resolution division markings, variable night-vision dimming, and solid-state driver electronics, it delivers accurate, smooth steering monitoring across bridge consoles, steering stands, and chart tables.

Key Features:
• True Heading Display: Dedicated repeater optimized for displaying True Heading inputs from gyrocompasses and satellite compasses.
• High-Precision Compass Dial: Crisp 360-degree card layout with fine degree graduation for immediate, accurate heading verification.
• NMEA 0183 Protocol Support: Reads standard IEC 61162-1 serial sentences including $HEHDT, $THS, and $INHDT.
• Variable Night Backlighting: Red LED illumination with built-in front-panel dimmer control for dark bridge operations.
• Robust Solid-State Driver: High-reliability stepping drive mechanism provides smooth card motion without chatter or lag.
• Flexible Console Mounting: Compact housing designed for flush console mounting or bracket-mounted installation.