Updates & Downloads

Marine Software - OTA - 006-B3581-00 software version 4305

as of May 7, 2026

Use Garmin Express to install this file.

(324.72 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.