USER GUIDE
Run draft, stability, cargo and tank checks
Choose the active vessel and condition, enter measured values carefully, correct highlighted issues, calculate, compare with approved criteria and save the record. Replace all example values before real work.
How to interpret it safely
Choose the active vessel and condition, enter measured values carefully, correct highlighted issues, calculate, compare with approved criteria and save the record. Replace all example values before real work.
The user guide explains what the information means, how the result is produced and which warnings or limits matter.
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Practical learning and web tools
What to know before you use it
How to use this feature well
Review the load plan, corrected GM, GZ curve, criteria and draft-survey corrections together for the selected condition. The result supports your review; it is not class approval.
Where the information comes from
Run draft, stability, cargo and tank checks: Before using a result, check its provider, datum, time basis, confidence and installed-data details.
Check your inputs
Run draft, stability, cargo and tank checks: Complete missing information and correct inconsistent or out-of-range vessel, position and calculation values.
Understand the calculation
Run draft, stability, cargo and tank checks: Keep the units, vessel particulars, time zone and selected method in view when reading a result or export.
When to stop and review
Run draft, stability, cargo and tank checks: Read each warning, correct its cause and recalculate before continuing.
Use it within its limits
Run draft, stability, cargo and tank checks: 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.
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