E125 Anomalies (includes Autopilot)

[Chuck - Raymarine - Moderator]

Ron,

Q1. After the AP software was updated, the P70 gave a message that recalibration was required. The dockside wizard was subsequently run.
A1. Specifically, did you command the autopilot to be reset per the command sequence found here before performing these actions?

Q2. The boat was positioned on the first leg of the route, waypoint was advanced so it was the second waypoint. Track mode was then engaged. The waypoint was displayed on the E125 and the BTW was consistent with boat position. The behavior occurs on any leg going to the next waypoint.
A2. Thanks for for confirming that navigation is directing the system to the waypoint forward of the vessel's position along the route's leg.

Q3. Did you get the photos of the E125 screen? One shows making a 32 degree turn to port to go from a heading of 217 M to the BTW of 218 M. I'd expect to make turn 1 degree stbd. The other photos show similar inconsistencies. They all appear to be off by about 33 degrees to port. The E125 manual (page 83) shows turning 166 degree to starboard when the BTW is only 68 degrees to starboard.
A2. Yes. When operating in Track mode when following a route, the autopilot's function is to move the vessel to the leg line of the route leg being navigated and maintain the vessel's position with a user configured corridor either side of the route leg while moving in the direction of the route leg's destination waypoint. The width of the corridor and aggressiveness with which the autopilot will seek to join the leg line are determined by the autopilot's Response Level configuration setting. As such, when track mode is enabled, the vessel immediately seek to join the route leg, not necessarily steer in the direction of the waypoint. Depending upon the Response Level setting and the vessel's position and heading with respect to the leg line, the turn angle will vary. You may want to consider displaying the Cross Track Error and Waypoint Info data items within a Databox or within the Databar of any future screen snapshots included with posts.