Read this before you trust a pin. There is no complete, public, current national list of airtanker and SEAT bases. The authoritative NWCG Airtanker Base Directory (PMS 507) sits behind the EGP login. This map is assembled from public documents and each row shows the year of the source it came from: 2024–2026 rows are from current mobilization guides, agency pages or news of a base opening; 2019 rows are from the last public PMS 507 snapshot; VLAT tags marked 2014 come from the only public NIFC VLAT list. Bases open, close, and change category every season — confirm with the GACC mobilization guide (Chapter 50) or the dispatch center before you plan around one. Coordinates are the airport reference point from the public OurAirports dataset, not the tanker base ramp.