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Encyclopedia of Marine Technology

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Damage Consequence Diagram (DCD)

A practical method of presenting the impact of damage on the ship’s stability developed for passenger vessels by Three Quays Marine Service.

Damage Control Information (DCI)

The Damage Control Information is a part of onboard documentation. The documentation should be clear and easy to understand.

Damage Control Manual

The main purpose of this document is to stipulate appropriate action in the case of the hull damage. It should contain the following parts:

Damage control team

A group of crewmembers trained for fighting flooding in the vessel.

Damage penetration zone, damage zone

The zone of the ship where the stipulated damage can be assumed. The stipulated damage is defined in the applicable damage stability requirements.

Damage stability

Stability of a flooded ship. When water runs into a ship following an accident, different scenarios can take place.

Damage stability calculations

Calculations of stability of damaged ship are complicated and tedious. At present, two different analysis concepts are applied: the deterministic concept and the probabilistic concept.

Damage survey

Occasional surveys which are requested as a result of hull damage or other defects. The damages may result from grounding, collision, heavy weather, contact damage, etc.

Damage Survivability Information (DSI)

An analysis of different damage scenarios for standard loading conditions. In the event of damage to a ship, an assessment of the exact impact of the damage on the vessel’s stability is quite difficult.

Damage to the environment

Substantial physical damage to human health or to marine life or resources in coastal or inland waters, or areas adjacent thereto, caused by pollution, contamination, fire, explosion or similar disasters.

Damper

1. A hinged flap used to control gas flow, e.g. fire damper in an air trunk. 2. An energy-dissipating device which reduces the amplitude of certain vibration, e.g. axial vibration damper or torsional vibration damper.

Damping

The process, which dissipates the energy of a vibrating system in order to reduce the amplitude of the vibration or oscillation.

Dangerous area

An area on a tanker, which, for the purpose of installation and use of electrical equipment, is regarded as dangerous.

Dangerous good manifest

A special list of dangerous goods on board and their location.

Dangerous goods

All substances of an inflammable nature which are liable to spontaneous combustion either in themselves or when stowed next to other substances and, when mixed with air...

Dangerous goods classes

Classes of dangerous goods according to SOLAS (Chapter VII, Part A), the BC-Code and the IMDG-Code, are as follows:

Danish Institute of Fire and Security Technology (DIFT)

A modern fire laboratory equipped to carry out fire tests according to all European and international standards. More than 1000 fire tests are carried out in the laboratory every year.

Data logger

A printer used as a part of a control system to provide a log or record of parameters either on demand or at set intervals.

Datum

1. A reference point or line from which measurement are made. 2. The most probable position of a search target at a given time.

Daughter boat

A fast support boat designed to be carried aboard a larger vessel. Standard boats are equipped with a special lifting arrangement with a steel frame for safe launch and recovery, and a release hook to fit a davit system.

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