USER GUIDE
Understand the calculation
Keep the units, vessel particulars, time zone and selected method in view when reading a result or export.
How to interpret it safely
Keep the units, vessel particulars, time zone and selected method in view when reading a result or export.
The user guide explains what the information means, how the result is produced and which warnings or limits matter.
See the main screens
Practical learning and web tools
What to know before you use it
How to use this feature well
Choose the calculator that matches the known quantities, keep units and reference frame explicit, then test whether the result is operationally plausible before recording it.
Where the information comes from
Understand the calculation: Before using a result, check its provider, datum, time basis, confidence and installed-data details.
Check your inputs
Understand the calculation: Complete missing information and correct inconsistent or out-of-range vessel, position and calculation values.
Understand the calculation
Understand the calculation: Keep the units, vessel particulars, time zone and selected method in view when reading a result or export.
When to stop and review
Understand the calculation: Read each warning, correct its cause and recalculate before continuing.
Use it within its limits
Understand the calculation: CaptainCalc supports decisions; approved vessel documents, official publications and the master's judgement remain authoritative.
Continue learning
CaptainCalc is decision support. It never replaces approved stability data, loading computers, ECDIS, official publications, procedures or professional judgment.
Get CaptainCalc on Google Play
Freemium keeps essential online tools available with ads. Premium removes ads, raises limits and unlocks the complete offline professional workspace.
