Operational control center
Not a loose collection of calculators. CaptainCalc keeps vessel, voyage, source and record context visible from input to export.
CURRENT PRODUCTION CAPABILITIES
Current production capabilities
A complete view of what CaptainCalc ships today, grouped by operational outcome rather than menu labels.
Vessel profile and setup
Open the profile from Home. Enter vessel particulars and only use approved hydrostatic, stability, tank and capacity data. For evaluation, load the full demo ship and review every source before operational use.
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/GZ evidence, dynamic downflooding boundaries, criteria checks and explicit approved-source provenance.
Draft survey
Six-draft correction, hydrostatic interpolation, load cases, GM/GZ evidence, dynamic downflooding boundaries, criteria checks and explicit approved-source provenance.
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
Voyage, stability, draft, tank and calculation history with supported export formats plus COLREG rules, sound signals, IALA and maritime reference material.
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
Optional encrypted snapshots with up to 10 restore points, same-account recovery and up to 30 days of retrieval after Premium ends. Backup is not live synchronization.
CaptainCalc is decision support. It never replaces approved stability data, loading computers, ECDIS, official publications, procedures or professional judgment.