Updates & Downloads

Marine Software - OTA - 006-B4509-00 software version 4204

as of February 4, 2026

Use Garmin Express to install this file.

(320.29 MB)

Notes:

• WARNING: If this software is uploaded to a device other than that for which it is designed, you will not be able to operate that device.
• If attempts to upload software fail, you may need to return the device to Garmin® for service.