iStreams Dover Strait vs Celestial Navigation 360

iStreams gives you instant access to the Dover Strait tidal stream atlas, aligned to the current time using High Water at Dover — even when you're offline. Whether you're sailing, navigating coastal waters, or passage planning, iStreams helps you understand tidal flow quickly and accurately. Key Features: Real-time tidal stream charts Automatically displays the correct hourly chart based on the nearest Dover High Water time. Fully offline functionality (forecast link requires a connection) No signal? No problem. All charts and tools work without internet access. Automatic chart updates As time progresses, the app switches to the next valid tidal period. Swipe forward and backward through tidal hours with ease. Pinch to zoom and drag to explore details. Toggle between Local Time and UTC. Show boat position on the chart Navigation Tools: Interpolated Rate Calculator * Instantly calculate stream rate between neaps and springs. Tidal Set Tool (In-App Purchase) * Measure the true direction of tidal stream arrows with precision. Course to Steer (CTS) (In-App Purchase) * Calculate the correct heading to maintain your intended course. How It Works: iStreams automatically selects the nearest High Water at Dover and displays the corresponding tidal stream chart. Want to plan ahead or review earlier conditions? Simply swipe forward or backward through the tidal hours to view past or future data. Why Choose iStreams? Designed for sailors, navigators, and coastal users Fast, clear, and easy-to-use interface Accurate tidal data when you need it most

Each measurement taken with a sextant (a 'sight') converts to a line of position (LoP) on a chart, the intersections of two or more such lines providing a position fix Use this app to plan/enter sights and inspect the resulting LoPs -- Features -- * Realtime or frozen computed horizon in panoramic projection. Use for star/planet identification, sight preparation and entry, true bearings etc. * Sight reduction (ephemerides calculated internally) for the 58 almanac-listed navigational stars. Extendable to the sun, moon and planets via subscription * Almanac rising/setting/transits/twilights * Sextant-like functionality via the camera Licensed under Apple's standard End User License Agreement (EULA), available at: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/