Use the Links below to find updates for your Device
Garmin: (April 2024)
https://www.garmin.com/en-US/support/software/marine/
App: Active Captain
Humminbird: (February 2024)
https://humminbird.johnsonoutdoors.com/us/support/software-updates
App: One-Boat Network
Lowrance: (December 2023)
https://www.lowrance.com/downloads/
App: Lowrance (only says it can download software updates)
Raymarine:
https://www.raymarine.com/en-us/support/software-updates-and-documents
App: Raymarine (cannot perform software updates)
All of these brands warn that you should NEVER interrupt a software
update in progress, or you may render your device unusable. For that
reason, I choose to use the software update method with the least number
of possible points of failure—by downloading the updates to a storage card
(SD or Micro SD, depending on the individual device requirement).