https://usngapp.org/
USNGApp (Mobile USNG ELM)
mobileelm
https://www.esri.com/arcgis-blog/products/defense/defense/mgrs-usng-coordinates-to-web-map-made-easy
MGRS/USNG Coordinates to Web Map Made Easy
Mar 26, 2018 - Have you ever received files containing coordinates in Military Grid Reference System (MGRS) or United States National Grid (USNG) format...
web mapcoordinatesmadeeasy
https://gis.fema.gov/arcgis/rest/services/FEMA/IA_Aggregate_USNG/MapServer/2
Layer: Total IA Inspections Aggregated to 1KM USNG (Apps 10) (ID: 2)