Captain’s Mode Maritime

Best Maritime Educational Resource

A ship captain looking out on deck from the windshield inside the ship's bridge.

Career Guide

A trainee holding a hand flare while on top of a liferaft during their basic safety training.

Health and Safety

Shipmaster saluting.

Shipboard Ranks

A seaman using inside the bridge using a binocular as the background for the book title, The Basics of Navigation..

Navigation

A seaman using his mobile phone while watching a beautiful sunset on on calm waters.

Seaman’s Life

An Officer training his crew about an important ship equipment.

Ship Knowledge

Welcome to Captain’s Mode Maritime ⚓
Your trusted source for maritime education, navigation tutorials, and seafaring insights. We publish practical guides on ship handling, navigation, practical seamanship, safety guides, and life at sea — written for cadets, deck officers, and maritime professionals seeking accurate, easy-to-follow content materials.

Recently Published

ECDIS Safety Depth vs Safety Contour: A Practical OOW Configuration Guide

Safety Depth and Safety Contour are not the same setting. Safety Depth makes potentially unsafe individual charted soundings more conspicuous. Safety Contour establishes the boundary between navigable and unsafe water for the vessel and is used by…
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Seaman’s Notes

Echo Sounder Draft Offset: DBT, DBK and DBS Explained for Safe Navigation

An echo sounder draft offset determines the reference point from which a depth reading is…
Emergency Steering Gear Drill: Bridge-to-Steering Flat Changeover Guide

An emergency steering changeover is the controlled transfer of rudder control from the bridge to…
Radar Performance Monitor (PM) Testing and Blind Sector Plotting

A radar performance monitor provides a means of checking transmitter and receiver performance against a…

OOW Guide to GNSS Spoofing: Detecting and Navigating False GPS Fixes

Global Navigation Satellite System (GNSS) spoofing has become an operational reality. Operating in choke points…
USCG MMC Renewal Guide: Sea Service Rules, Grace Periods & Common Rejections

To renew a USCG Merchant Mariner Credential (MMC), mariners must submit Form CG-719B along with…
⚓ What Is Squat in Ship Navigation? Formula, Causes, & UKC Standards Explained

Squat is the increase in a ship’s draft caused by hydrodynamic sinkage as speed increases…

Restricted Visibility Checklist: What to Do When Your Ship Enters Restricted Visibility

When restricted visibility is encountered or expected, the Officer of the Watch (OOW) must act…
⚡️ Electro-Technical Officer (ETO): Responsibilities, Safety Protocols, and Career Path

An Electro-Technical Officer (ETO) is the licensed engine department officer responsible for a ship’s electrical,…
⚓ Deck Officer vs Engine Officer: Which Career Should You Pick?

Choosing between becoming a deck officer and an engine officer is one of the most…

Mariner’s Handbook

⚓ What Is a Riding Gang on a Ship? Everything Seafarers Need to Know

The riding gang, riding squad, or riding crew is one of shipping’s most misunderstood roles…

👨🏼‍💻 What If Your ECDIS Fails? A Mariner’s Guide to Bridge Contingency & Redundancy

The Electronic Chart Display and Information System (ECDIS) has become the backbone of modern navigation. Yet, despite its reliability, no system is immune to failure. Imagine approaching a congested traffic…