The Lilley & Gillie SR4 is a high-performance Class A magnetic compass designed for SOLAS-class and deep-sea vessels. Built with precision engineering and robust materials, it provides reliable heading information, smooth card movement, and long-term stability. The SR4 is suitable for use with binnacles, overhead mounting, and integration with autopilot repeaters, making it a widely trusted standard compass for commercial marine navigation.
| Compass Class | Class A (SOLAS compliant) |
| Card Diameter | Typically 180 mm / 6.5–7 in (varies by configuration) |
| Heading Accuracy | High-precision mechanical heading indication |
| Mounting Options | Pedestal/binnacle, overhead, or bracket mount |
| Material | Marine-grade, corrosion-resistant construction |
| Accessories | Binnacles, azimuth circles, lighting units |
| Compliance | IMO, ISO standards for magnetic compasses |