Mr. Lewis,

Thank you for contacting Humminbird. Please note there has not been any update regarding the GPS for the response time. If there is an issue with the position fix ensure the GPS receiver is mounted in an open area for optimum satellite reception. If the GPS is internal this is meant the same for the 797 display to be mounted in an open area. If there are still concerns with the operation you may send the system to Humminbird to be checked and serviced as needed. Address is listed below:
Attn: Service Dept
Humminbird
678 Humminbird Lane
Eufaula AL 36027

Regards,
Jennifer-CRC