UK and Channel Islands tide gauges: Generated using E.U. Copernicus Marine Service Information; Global Ocean - Delayed Mode Sea level product (INSITU_GLO_PHY_SSH_DISCRETE_MY_013_053), https://doi.org/10.17882/93670. Harmonic constants analysed by the course.
French tide gauges: sea-level observations from REFMAR, Shom (Réseaux de référence des observations marégraphiques), downloaded September 2026, Licence Ouverte 2.0 (Etalab). Harmonic constants analysed by the course; this reuse is not endorsed by the Shom.
Secondary ports: "The FES2022 Tide product was funded by CNES, produced by LEGOS, NOVELTIS and CLS and made freely available by AVISO". CNES, 2024. FES2022 (Finite Element Solution) Tidal model (Version 2024) [Data set]. CNES. https://doi.org/10.24400/527896/A01-2024.004 — AVISO License Agreement (Issue 20), https://www.aviso.altimetry.fr/fileadmin/documents/data/License_Aviso.pdf. Modified from the original distribution: harmonic constants extracted at port positions and referred to chart datum.
Tidal streams: Shom, 2026. Atlas de courants de marée 2D au format netcdf, https://dx.doi.org/10.17183/ATLASCOURANTS2D_NETCDF. Licence Ouverte (version 2.0 d'avril 2017), définie par la mission Etalab.