Damage control (DC) is the body of knowledge and skill required to maintain a vessel's watertight integrity and stability after a casualty. Casualties can include collision damage, grounding, fire, explosion, or flooding from any source. The ability to quickly assess damage and prioritize response is what separates a controlled emergency from a catastrophic loss.
Flooding and stability
When a compartment floods, the vessel loses buoyancy in that space and the added weight (free surface or solid flooding) lowers the ship in the water and can induce a list. Emergency response priorities are:
- Assess which compartments are flooding and their watertight integrity
- Close all watertight doors and hatches in the affected zone immediately
- Start dewatering pumps if flooding is controllable
- Calculate the stability impact and counterflooding requirements if the ship is listing dangerously
Damage control parties
SOLAS vessels must have a damage control organization with trained parties (usually 4–8 crew per party) who know their station and can rig emergency pumps, apply plugs and patches, and shore up bulkheads. The DC game simulates directing multiple parties simultaneously while the casualty evolves in real time.
32 free maritime games — no account needed
Binnacle AI Arcade has games for every aspect of seamanship, from cargo stowage to COLREGS to heavy weather. Free to play, global leaderboards, daily challenges.
Browse all games ▸
Frequently asked questions
What is a watertight door?
A watertight door is a specially sealed door in a vessel's watertight bulkhead that, when closed, prevents water from passing through. SOLAS requires watertight doors in certain locations and specifies when they may be left open at sea.
What is free surface effect?
Free surface effect is the destabilizing influence of liquid moving in a partially filled tank. When a ship rolls, the liquid shifts toward the low side, magnifying the roll and reducing the effective GM. A flooded compartment with partial water is more dangerous to stability than one fully flooded.
What is counterflood?
Counterflood is the deliberate flooding of a symmetric compartment on the opposite side of the ship to reduce or eliminate a list caused by off-center flooding or damage. It increases displacement (makes the ship heavier) but can save the vessel from capsizing.
What does 'making way' mean for DC teams?
In damage control context, 'making way' means a DC party is en route to its damage station. Clear communications and a standard check-in protocol ensure the DC officer knows which spaces are attended and which boundaries are holding.