Join Date: Feb 2010
Location: Narragansett Bay
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Re: AIS on Navionics Boating App?!
If you look on the official government charts, there is a reference to the last survey done. Usually the chart has several sections, with various dates. Several years old would be very recent. Decades is not uncommon. I recall there are places on the Bay here that are a century old, iirc. However, not everywhere shoals. Our bottoms are mud, sand and rock, so they likely remain fairly stable.
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In the harsh marine environment, something is always in need of repair. Margaritas fix everything.