Watertight Door Fundamentals

This course provides a comprehensive introduction to watertight doors, one of the most important safety-critical systems found on board commercial vessels. You will learn why watertight doors were developed, how they contribute to ship survivability, and how they prevent flooding from spreading through a vessel.

The course explains the differences between weathertight and watertight doors and introduces the main types of watertight doors, including manually operated, electrically operated, and electro-hydraulic designs. You will also explore stored energy systems that allow doors to be operated even when electrical power is unavailable.

Through clear explanations and practical examples, you will learn how watertight doors are controlled from local stations, remote control positions, and central control stations. The course also introduces key SOLAS requirements related to watertight door design, operation, and maintenance.

By the end of this course, you will understand the main components of a typical watertight door, how to operate it safely, and why correct operation is essential for the safety of the vessel and everyone on board.