Updates & Downloads

Marine Software - OTA - 006-D4638-01 software version 420

as of June 10, 2026

Use Garmin Express to install this file.

(1.65 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.