MaritimeHub

Offline navigation toolkit for deck officers: ETA, Celestial, Drafts, References

MaritimeHub is a complete offline navigation toolkit for mariners and deck officers.
It works fully offline (except Weather Online) and combines essential calculators, tools, and reference pages in one app.

Navigation Tools:
• ETA Calculator — calculate ETA using current device time or a manually selected departure date and time.
• Required Speed — required average speed to reach a selected arrival date and time.
• Multi-WP ETA — full route ETA for multiple waypoints.
• Leg Summary — passage analysis: time between dates, average speed, SLIP, and more.
• Noon Report — reports: Noon / BOSP / EOSP and other formats in a consistent layout.
• True Wind — true wind calculation.
• Anchor Length — anchor chain length and swing radius estimation.
• CPA Calculator — CPA / TCPA and related close-quarters parameters.
• Squat Effect — squat calculation while underway.
• Draft vs Density — draft correction for water density changes (DWA / density correction).
• Trim Correction — draft correction due to trim (transfer to marks / perpendiculars).
• Draft Survey — draft survey calculation (displacement / cargo / constant, depending on input).
• Opposite Draft — opposite side draft / heel (list) related calculations.
• Magnetic Variation — adjustment of Charted Magnetic Variation to the Voyage Year.
• Coords Converter — Degrees / Degrees+Minutes / DMS converter.
• Unit Converter — common maritime unit conversions (speed, length, pressure, etc.).
• ECDIS Contours — Shallow / Safety / Deep contour calculations.
• Point to Point — course & distance (Rhumb Line / Great Circle), intermediate points for Great Circle Route.
• Compass Error — gyro / magnetic compass error & correction calculations, Star Finder, supports auto-filling latitude/longitude using the device GPS.
• Celestial Navigation — determine the vessel’s position using three celestial bodies.
• Navigation Mode — live GPS position, speed, course, trip distance, average speed.
• Roll Meter — live heel monitoring + automatic roll period and metacentric height (GM) computation.
• Bunker Calculation — voyage bunker planning: sea/port consumption, bunker received, and estimated BROB.
• Blind Distance — blind distance under the bow + propeller immersion percentage.
• Propeller Distance — distance run in nautical miles based on propeller RPM and elapsed time.
• Roll & GM — roll period and / or GM (metacentric height) calculations.

References:
• CATZOC — depth accuracy / uncertainty calculation for any CATZOC category.
• Sun Times — sunrise / sunset and twilight for any position & time zone + auto-filling latitude/longitude using the device GPS.
• Moon Phases — moon phase reference.
• Meteo Scales — Beaufort scales.
• Cargo Ventilation card — assess when cargo ventilation is needed.
• Dew Point / Humidity card — calculate dew point and relative humidity.
• Navtex — Interactive map NAVTEX station coverage plus live vessel position from your device GPS (reference).
• Navarea — Interactive map NAVAREA regions coverage plus live vessel position from your device GPS (reference).
• Load Lines — Interactive map Load Line zones plus live vessel position from your device GPS (reference).
• IALA — IALA buoyage system (Region A/B) + Interactive map plus live vessel position from your device GPS (reference).
• ICS — International Code of Signals.
• Ports — ports database (~7,244) with coordinates and UN/LOCODE.
• Country Flags — national flags.
• World Time — world time & time zones (including DST transitions).
• Tide Height — intermediate tide height calculations.
• Weather Online — online weather view (PassageWeather.com).
• GRIB Builder - for requesting weather overlay data for ECDIS.
• Morse Code.
• Colreg 72 — COLREG 72 with illustrations/annexes.
• Earnings — salary calculator (Basic / Overtime / Leave Pay, etc.).
• All calculators support printing/export — to PDF or directly to a printer.

MaritimeHub is a practical all-in-one navigation assistant built for professionals at sea.