Create or load a vessel profile
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.
CAPTAINCALC USER GUIDE
From first setup to a saved result
Use this guide to understand each part of CaptainCalc and choose the instructions that match your task. Available options depend on access level, installed data and vessel setup.
Start a voyage
Create a voyage or template, add departure, destination and waypoints, review route distance and ETA, then prepare a compatible offline map pack before leaving reliable coverage.
Work professional tides and UKC
Select a station or coordinates, check the source, datum, confidence and validity, then review height or current. For UKC, enter draft, squat and safety margins and save the result with its source details.
Prepare GMDSS work
Choose distress, urgency or safety, complete the DSC worksheet, run readiness checks and create authorized log records. Use MSI/NAVTEX and station information as decision support only; transmit using certified equipment and approved procedures.
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.
Use celestial and bridge calculators
Create observations with UTC time, DR position, body and sextant inputs; apply corrections, reduce sights and combine LOPs into a fix. Use quick calculators for repeatable bridge checks and save key results.
Review records and export
Open Records to inspect voyage, stability, draft, tank and calculation history. Export only supported formats and review the generated file before relying on it in another system.
Configure privacy, ads and backup
Analytics controls are in Settings. GDPR consent is requested only where legally required; outside those regions personalized advertising defaults on. Premium users can create encrypted snapshots and restore them on the same account; backup is not live sync.
Solve common problems safely
If a source, access, location permission or vessel detail is missing, CaptainCalc explains what is needed. Check the connection, permissions and data date, then try again without using an outdated value.
Where the information comes from
Before using a result, check its provider, datum, time basis, confidence and installed-data details.
Check your inputs
Complete missing information and correct inconsistent or out-of-range vessel, position and calculation values.
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
Read each warning, correct its cause and recalculate before continuing.
Use it within its limits
CaptainCalc supports decisions; approved vessel documents, official publications and the master's judgement remain authoritative.
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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