WMM 2025 updates released December 17, 2024; replace 2020 model.

152353Z OCT 24
NAVAREA XII 826/24(GEN).
WORLD MAGENETIC MODEL (WMM) 2025 UPDATE
1. AS PART OF THE REGULAR UPDATE CYCLE OF THE
WORLD MAGNETIC MODEL (WMM),
THE NATIONAL OCEANOGRAPHIC & ATMOSPHERIC
ADMINISTRATION (NOAA)/ NATIONAL CENTERS
FOR ENVIRONMENTAL INFORMATION (NCEI),
IN COLLABORATION WITH THE BRITISH
GEOLOGICAL SURVEY (BGS), WILL RELEASE THE
WMM2025 ON DECEMBER 17, 2024.
THE CURRENT 2020 WMM WILL EXPIRE ON
DECEMBER 31, 2024.
2. IN ORDER TO AVOID ANY MODEL PERFORMANCE
DEGRADATION, USERS ARE RECOMMENDED TO
DOWNLOAD AND INSTALL THE WMM2025
MODEL COEFFICIENTS, WHICH WILL
BE PUBLISHED ONLINE AT
HTTPS://WWW.NCEI.NOAA.GOV/PRODUCTS/
WORLD-MAGNETIC-MODEL.
3. THE WMM IS THE STANDARD MODEL USED
BY THE U.S. DEPARTMENT OF DEFENSE (DOD),
CIVIL AGENCIES, THE NORTH ATLANTIC TREATY
ORGANIZATION (NATO), AND THE INTERNATIONAL
HYDROGRAPHIC ORGANIZATION, FOR A
WIDE-RANGE OF POSITIONING AND NAVIGATION
SYSEM APPLICATIONS THAT USE THE GEOMAGNETIC
FIELD, INCLUDING ALL AIRCRAFT, SHIPS,
SUBMARINES, AND GPS UNITS.
4. CANCEL THIS MSG 010001Z JAN 25.