How to Use CaptainCalc

Install and complete first launch

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.

1. Open the relevant workspace from the control center.
2. Enter or select the required source data and review validation messages.
3. Check the result, warnings and source context before saving or exporting.

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Understand the control center

Not a loose collection of calculators. CaptainCalc keeps vessel, voyage, source and record context visible from input to export.

1. Open the relevant workspace from the control center.
2. Enter or select the required source data and review validation messages.
3. Check the result, warnings and source context before saving or exporting.

Read the detailed guide

Create the 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.

1. Open the relevant workspace from the control center.
2. Enter or select the required source data and review validation messages.
3. Check the result, warnings and source context before saving or exporting.

Read the detailed guide

Plan and monitor 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.

1. Open the relevant workspace from the control center.
2. Enter or select the required source data and review validation messages.
3. Check the result, warnings and source context before saving or exporting.

Read the detailed guide

Run a quick bridge calculation

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.

1. Open the relevant workspace from the control center.
2. Enter or select the required source data and review validation messages.
3. Check the result, warnings and source context before saving or exporting.

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Use tides, currents 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.

1. Open the relevant workspace from the control center.
2. Enter or select the required source data and review validation messages.
3. Check the result, warnings and source context before saving or exporting.

Read the detailed guide

Prepare stability and draft work

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.

1. Open the relevant workspace from the control center.
2. Enter or select the required source data and review validation messages.
3. Check the result, warnings and source context before saving or exporting.

Read the detailed guide

Work with cargo, holds and tanks

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.

1. Open the relevant workspace from the control center.
2. Enter or select the required source data and review validation messages.
3. Check the result, warnings and source context before saving or exporting.

Read the detailed guide

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.

1. Open the relevant workspace from the control center.
2. Enter or select the required source data and review validation messages.
3. Check the result, warnings and source context before saving or exporting.

Read the detailed guide

Record and reduce celestial sights

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.

1. Open the relevant workspace from the control center.
2. Enter or select the required source data and review validation messages.
3. Check the result, warnings and source context before saving or exporting.

Read the detailed guide

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.

1. Open the relevant workspace from the control center.
2. Enter or select the required source data and review validation messages.
3. Check the result, warnings and source context before saving or exporting.

Read the detailed guide

Prepare for weak connectivity

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.

1. Open the relevant workspace from the control center.
2. Enter or select the required source data and review validation messages.
3. Check the result, warnings and source context before saving or exporting.

Read the detailed guide

Manage privacy, ads and Premium

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.

1. The GDPR consent notice is requested only in regions where that consent flow is legally required.
2. Outside GDPR regions, personalized advertising is enabled by default.
3. If personalization is refused, non-personalized advertising can still be shown.

This is a product-behavior summary, not legal advice. See Privacy & Terms for the current policy. Open Privacy & Terms

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Troubleshoot blocked workflows 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.

1. Open the relevant workspace from the control center.
2. Enter or select the required source data and review validation messages.
3. Check the result, warnings and source context before saving or exporting.

Read the detailed guide