Abstract: To improve the performance of satellite navigation by using error messages, an enhanced error correcting method based on CRC code was proposed. The CRC-24 error checking code of navigation message was used to correct one-bit error pattern. The minimum hamming weight and error correcting capability of CRC-24 code were proved by mathematical analysis and computer searching. The performance improvement of navigation using CRC correction was analyzed based on message format and the model of error bit distribution. A low complexity implementation was schemed based on looking-up table. The performance of enhanced error correcting was simulated with GPS CNAV navigation message. The results show that the CRC-assisted correction can reduce frame error ratio by 1~2 orders of magnitude. Without changing the signal structure of navigation message, the reliability of navigation is improved by using the enhanced correction.