Calculators & Checklists Hub
Index of all Maritime Hub bridge calculators and checklists, with the philosophy that underpins their proper use as aids to judgement.
Passage Planning Templates
Passage planning templates exist to reduce cognitive load, not to replace thought. Structure, content, and the failure mode of tick-box compliance.
Bridge Equipment Overview
A senior mariner’s tour of the modern wheelhouse: what each system does, what it needs, and how it fails when no one is watching.
ECDIS alarms and alert management
Why ECDIS alarm flooding is a passage planning failure, not a system problem, and what MSC.302(87) actually changed on the bridge.
ENC vs RNC – understanding chart types
Vector ENCs and raster RNCs look similar on screen but are fundamentally different in structure, safety function, and legal standing under SOLAS.
COLREGs – Narrow Channels, TSS & Overtaking
Rules 9, 10 and 13 examined in operational depth: the obligations masters and officers must internalise, not just cite.
Tidal calculations and secondary ports
How to work a full tidal prediction for a secondary port, why the tables still matter, and what the digital tools will never tell you.
Loadicator use and limitations
Loadicators calculate still-water conditions and nothing more. Understanding what the instrument cannot see is as important as reading what it shows.
Dangerous goods – deck stowage basics
Deck stowage of dangerous goods is not a checkbox exercise. Segregation, access, and documentation failures kill ships and crews.
Fire on the Bridge
A bridge fire is not just a fire. It is a simultaneous attack on navigation, communications, and ship control. Here is what that means in practice.