Operational control center
Not a loose collection of calculators. CaptainCalc keeps vessel, voyage, source and record context visible from input to export.
WHAT CAPTAINCALC OFFERS
What CaptainCalc offers today
Explore the app by the job you want to complete, from planning a voyage to reviewing a saved record.
Vessel profile and setup
Open the profile from Home and enter approved vessel, hydrostatic, stability, tank and capacity data. You can explore the app with the built-in example vessel, then replace every example value before real work.
Voyage planning and monitoring
Voyages, templates, routes, waypoints, port calls, live progress, track recording, installed offline map packs and supported PDF/CSV/GPX/KML exports.
Professional tides, currents and UKC
Signed global FES predictions, NOAA high/low-water events, available current sources, visible datum and confidence, point UKC, route UKC, squat and operational safety margins.
GMDSS decision support
DSC distress/urgency/safety worksheets, equipment readiness, authorized radio logs, station directory and source-backed MSI/NAVTEX review. No transmission or radio control.
Ship stability
Six-draft correction, hydrostatic interpolation, load cases, GM and GZ results, downflooding limits, criteria checks and the approved data used for the condition.
Draft survey
Six-draft correction, hydrostatic interpolation, load cases, GM and GZ results, downflooding limits, criteria checks and the approved data used for the condition.
Cargo, holds, tanks and FSM
Cargo planning, hold capacity, tank calibration and soundings, density/temperature corrections, free-surface moment verification and condition-aware loading context.
Celestial navigation
Sun, moon, planet and star observations, sight correction and reduction, lines of position, fixes, noon sights, body identification and planning tools.
Quick bridge calculators
ETA, TTG and fuel, rhumb line, great circle, CPA/TCPA, set and drift, compass error, amplitude/azimuth, squat/UKC and other routine bridge calculations.
COLREG, SOLAS, IALA and references
Browse COLREG, SOLAS, IALA, IAMSAR and document tools with clear source details; always check the current official publication before operational use.
Records and exports
Voyage, stability, draft, tank and calculation history with supported export formats plus COLREG rules, sound signals, IALA and maritime reference material.
Captain's Lounge
A moderated, text-only professional discussion space for ports, routes, weather, cargo, stability and app tips, with rules, reporting, blocking and moderation.
Settings, offline data and continuity
Keep operational work continuous with language and unit settings, offline resources, protected backups and verified restore points; each control states what is stored locally and what requires connectivity.
CaptainCalc is decision support. It never replaces approved stability data, loading computers, ECDIS, official publications, procedures or professional judgment.
Get CaptainCalc on Google Play
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