A valve which permits the flow of liquid in only one direction, i.e. a non-return valve.

A plate used as floor, marked with raised diamond checkers or squares to provide good footing.

A chemical compound is a chemical substance composed of many identical molecules (or molecular entities) composed of atoms from more than one element held together by chemical bonds.

In chemistry, the term "contamination" usually describes a single constituent, but in specialized fields the term can also mean chemical mixtures, even up to the level of cellular materials.

Paints contain two components: the base and the hardener. Curing is obtained by mixing the base and hardener in defined proportions.

An element is a pure substance consisting only of atoms that all have the same numbers of protons in their atomic nuclei, chemical elements cannot be broken down into simpler substances by chemical means.

Chemical energy is the potential of a chemical substance to undergo a chemical reaction to transform into other substances.

A chemical plant is an industrial process plant that manufactures (or otherwise processes) chemicals, usually on a large scale.

According to Significant Ships of 2003 The BOW SUN, delivered by New Szczecin Shipyard in 2003, is one of the largest chemical tanker in the world.

Chemical tankers are cargo ships constructed or adapted and used for the carriage of any liquid chemicals in bulk.

Chemical thermodynamics is the study of the interrelation of heat and work with chemical reactions or with physical changes of state within the confines of the laws of thermodynamics.

Substances derived from petroleum or coal, caustics, acids, or products of polymerization.

Cherenkov radiation is electromagnetic radiation emitted when a charged particle (such as an electron) passes through a dielectric medium at a speed greater than the phase velocity (speed of propagation of a wave in a medium) of light in that medium.

Equipment fitted with a hydraulic arm to enable inspectors and workers to approach inaccessible areas of a structure.

The senior engineer officer responsible for the satisfactory operation and maintenance of the main and auxiliary machinery and boiler plant on board ships.

The officer in the deck department next in rank to the Master. The chief mate takes over the position of the Master in his absence.

A chiller is a machine that removes heat from a liquid via a vapor-compression, adsorption refrigeration, or absorption refrigeration cycles.

A sharp edged bend in a ship hull plating.

High molecular weight polymer which is used as a binder in some physically drying paints.

Chlorofluorocarbons (CFC’s) and hydrochlorofluorocarbons (HCFC’s) are fully or partly halogenated paraffin hydrocarbons that contain only carbon (C), hydrogen (H), chlorine (Cl), and fluorine (F), produced as volatile derivative of methane, ethane, and propane.