More than half of US waters are unmapped
US waters, either in the US exclusive economic zone or the Great lakes, cover approximately 3.6 million square nautical miles. As of January 2021, only 47% of US waters have been mapped (at 100 meter resolution).
Between October 2017 and October 2018, the unmapped portion of U.S. waters went from 59% to 57%. In January 2020, the unmapped portion went down from 57% to 54%.
The US Government has a goal of mapping all US waters by 2030, but at the current rate of surveying, we will not have all of the US waters mapped until 2041… at best.
In order to reach the 2030 goal we need to map an area equal to the total land area of the states of Montana and North Dakota combined (555,673 square kilometers).
For more details see: https://iocm.noaa.gov/seabed-2030-status.html
Progress Reports of unmapped U.S. Waters:
https://iocm.noaa.gov/seabed-2030/mapping-progress-report2021.pdf - January 2021
https://iocm.noaa.gov/seabed-2030/mapping-progress-report2020.pdf - March, 2020