Create or load a vessel profile
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.
DETAILED OPERATIONAL REFERENCE
From first setup to a saved operational record
Use this guide as the shortest safe path through the current app. Exact options depend on access level, installed packs and vessel data.
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, confirm source, datum, confidence and validity, then review height/current. For UKC, enter draft, squat and safety margins; save the result with its source evidence.
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, resolve validation warnings, calculate, compare with approved criteria and save the record. Never carry demo data into a real decision.
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.
Troubleshoot safely
If source verification, entitlement, location or vessel data is missing, CaptainCalc blocks or limits the action. Restore connectivity for verification, check permissions and source validity, then retry—never treat a blocked or stale value as current.
Source provenance
Check provider, datum, time basis, confidence and installed-pack evidence before using a result operationally.
Input validation
Resolve incomplete, inconsistent or out-of-range vessel, position and calculation inputs before relying on output.
Calculation context
Keep units, vessel particulars, time zone and selected method visible from input through record or export.
Warnings and blocking states
Warnings identify conditions that require review; blocking states must be resolved rather than bypassed.
Operational limitations
CaptainCalc is decision support. 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.