Boating GPS

[dingbat]

Not understanding .
My northeast subscription , which includes the bay, is renewed every april. Plus occasional updates.
My bay map last year showed different depths and shoaling from the previous year in various places .

NOAA is responsible for maintaining the official marine maps. If you go to the NOAA mapping website, they list the date the map area was last surveyed and the date of any critical updates made over the past year. If I don’t see any updates noted on the NOAA site, I don’t need to update

Having said that, I run Garmin Bluechart G3 Vision on both plotters. Not under subscription services which provide “daily” updates, if available. Maps are only updated when NOAA revises a chart

 

[dingbat]

Although I have never been able to find any proof, I believe my Garmin with built-in maps is updated over the air. I say this because the main channel in Barnegat Bay is uncharted on paper maps, as it changes all the time. However, the GPS unit always has the proper buoy positions (or nearly so), even after they change over the course of a season/off season.

Not familiar with the area, but I see the channel marked on the NOAA charts.

What built in charts are you using?

 

[jlh3rd]

Although I have never been able to find any proof, I believe my Garmin with built-in maps is updated over the air. I say this because the main channel in Barnegat Bay is uncharted on paper maps, as it changes all the time. However, the GPS unit always has the proper buoy positions (or nearly so), even after they change over the course of a season/off season.

I have to use active captain which then co-ordinates with my garmin for my updates. I have to use my ipad. Mine has the built in maps...I believe.

 

[Chris1956]

To be clear, the area I am referring to is the channel from the ICW to Barnegat inlet. The paper charts have a note that the buoys are not marked, as they change positions often. However, on my electronic chart built into the GPS unit, the buoys are marked and quite accurate.