BayCurrents vs Tides and Currents

BayCurrents is a mobile app for displaying maps of high resolution surface currents within the San Francisco Bay. The app is intended to support a wide range of maritime activities, from recreational fishing and sailing to the operation of professional transport vessels. The source for the surface current data is a numerical model operated by the National Oceanic & Atmospheric Administration (NOAA). The model benefits from oceanographic high-frequency radar (HFR) measurements from the Central & Northern California Ocean Observing System (CeNCOOS) HFR Network, along with other observations such as tides and wind. The resulting dataset contains current vector fields for hourly timestamps ranging from the recent past, to the present and up to 48 hours into the future. The complete vector dataset is downloaded by the app to allow autonomous offline operation. This app contains experimental data and is NOT for navigational purposes.

Tides and Currents provide 1343 harmonic tide stations,2199 subordinate tide stations and 849 harmonic current stations, 1707 subordinate current stations of USA. This app predicts tides and currents by using harmonic analysis calculations with Harmonic Constituents which can be get from NOAA website. So the APP can provide tide and current data without network。 Since calculations are performed locally on the device, tide and current data can be viewed for any date. In addition, the APP also provides sunrise,sunset, moonrise , moonset, dusk,dawn, moon phase of every day. In addition, the app provide tide map forecast. Disclaimer: The App loads astronomical tide level and tidal current data, which does not include changes in water levels and residual currents caused by meteorological or other factors. Under special circumstances, the impact of hurricanes, cold waves, floods and other factors should also be considered. Do not use Tides and Currents for navigation purpose or any other purpose that may result in personal injury or property damage. 【Pro】 1.No limit date for tides and currents 2.Select date directly with calendar 3. Month table for tides and currents 4.Unlock widget 5. Map forecast for 7 days. Purchase Notes: 1. The account will be automatically renewed and deducted the corresponding fee 1 day before the expiration. 2. If you need to cancel the renewal, please cancel in your personal iTunes account at least 1 day in advance. 3. After purchase, users can manage or turn off automatic renewal in personal account settings. Terms of Services : https://www.astronomyobserver.net/h5/tidesandcurrents/user Privacy policy: https://www.astronomyobserver.net/h5/tidesandcurrents/privacy