Update 1.47.1 adds firmware improvements to Deeper PRO+ 2 and CHIRP+ 2 sonars.
• During Ice Fishing Mode, the sonar now powers off after 15 minutes out of water instead of 5, giving more time to drill and check holes.
• (Advanced Feature) NMEA0183 now follows sonar ping rate (up to 15/s) instead of GPS (1/s), so data transmits even without GPS for better mapping and surveys.
• (Advanced Feature) Fixed an issue where PRO+2 models did not send NMEA messages.