References for bridge work and training
Use CaptainCalc with approved vessel documents, official publications and company procedures. These links are starting points, not a substitute for controlled onboard references.
Practical CaptainCalc references
Beaufort wind scale & sea state
Practical wind-force and sea-state reference.
Open →IALA buoyage system
Visual summary of lateral, cardinal and special marks.
Open →COLREG lights and shapes
Quick visual identification for common vessel situations.
Open →Professional tides & UKC guide
How to interpret source, datum, confidence, tide, squat and safety margins.
Open →GMDSS operational guide
Preparation boundaries, readiness, radio logs and MSI/NAVTEX review.
Open →Stability and draft workflow
Input provenance, validation, criteria and recordkeeping.
Open →Source provenance
Check provider, datum, time basis, confidence and installed-pack evidence before using a result operationally.
Open →Input validation
Resolve incomplete, inconsistent or out-of-range vessel, position and calculation inputs before relying on output.
Open →Calculation context
Keep units, vessel particulars, time zone and selected method visible from input through record or export.
Open →Warnings and blocking states
Warnings identify conditions that require review; blocking states must be resolved rather than bypassed.
Open →Operational limitations
CaptainCalc is decision support. Approved vessel documents, official publications and the master's judgement remain authoritative.
Open →Authoritative external sources
IMO
International maritime conventions, safety and GMDSS framework.
Open →IHO
Hydrographic standards and official hydrographic-office routing.
Open →IALA
Marine aids-to-navigation standards and guidance.
Open →NOAA Tides & Currents
Official United States water-level, current and station information.
Open →
CaptainCalc is decision support. It never replaces approved stability data, loading computers, ECDIS, official publications, procedures or professional judgment.