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Ship Watertight Door Regulations

 Ship Watertight Door Regulations

Watertight door requirements are governed mainly by:

  • SOLAS Convention

  • International Maritime Organization

Specifically under:
SOLAS Chapter II-1 – Construction – Subdivision & Stability

Purpose of Watertight Doors

  • Maintain watertight integrity

  • Prevent progressive flooding

  • Ensure ship survives after damage (damage stability compliance)

Main Regulations (SOLAS II-1)

1️⃣ Location

  • Fitted in watertight bulkheads

  • Especially in:

    • Engine room bulkhead

    • Shaft tunnel

    • Passenger ship compartments

2️⃣ Types of Watertight Doors

✅ Hinged Type

  • Manually operated

  • Used where frequent access not required

✅ Sliding Type (Most Common)

  • Power operated (hydraulic/electric)

  • Can be closed remotely from bridge

3️⃣ Passenger Ships – Strict Rules

  • Must be power-operated sliding type

  • Must:

    • Close in max 60 seconds

    • Be operable from bridge

    • Have local & remote control

    • Have audio/visual alarm before closing

  • Must be kept closed at sea

4️⃣ Cargo Ships

  • Fewer doors allowed

  • Generally manually operated unless required otherwise

  • Must be kept closed during voyage

5️⃣ Indicators & Alarms

  • Bridge panel must show:

    • Open / Closed status

  • Audible alarm when closing

  • Emergency power supply required

6️⃣ Testing Requirements

  • Tested:

    • Before departure

    • Weekly during voyage

  • Recorded in logbook

Chief Engineer’s Responsibility

  • Maintain hydraulic system

  • Check:

    • Door sealing gasket

    • Guide rails

    • Limit switches

    • Emergency hand pump

  • Ensure PMS compliance

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