That part of a ship resistance to motion that is due to the resistance of the air to above-water portion of the ship moving throught it.

A pressure vessel for storing compressed air. Air receiver is built and tested similarly to aboiler drum.

A pipe provided to equalize the tank pressure with the atmospheric one while the tank is being emptied or filled. Air pipes terminating on the open deck shall be fitted with approved air pipe heads.

An innovative concept of reducing hull friction by means of air lubrication. A layer of air is generated between the specially profiled underside and water surface, so that the vessel effectively glides through the water, reducing drag by 5-15%.

An enclosed space for entrance between an outdoor gas dangerous zone on open deck and a gas safe space, arranged to prevent ingress of gas to the gas safe space.

A heat exchanger, which uses steam, water or electricity to increase the air temperature.

Air guns are devices that rapidly release compressed air into water creating the effect of explosion. To provide sufficient energy for geophysical surveys, compressors generating extremely high pressures are required.

Thin-walled piping or ducting (circular or rectangular) used exclusively to conduct air.

A unit used to remove moisture from control air. It may use a refrigerant drier or a desiccant.

The vertical distance from the waterline to the highest fixed part of a vessel.

A craft with the whole or a significant part of its weight supported, whether at rest or in motion, by a continuously generated cushion of air with its effectiveness dependent on the proximity of the surface over which the craft operates.

A heat exchanger used to cool and, therefore, increase the specific density of air prior to combustion in an engine.

The airside of the scavenge air cooler is cleaned by a chemical fluid injected into a spray pipe arrangement. Polluted cleaning agent returns through a filter, to the chemical cleaning tank.

A typical recirculating system contains a fan to produce the airflow through the system, a cooling coil where the heat from the air is transferred to the cooling medium...

A tanker intended to carry oil from shelf fi elds not accessible to pipeline systems.

A propeller fitted within a duct or nozzle in order to improve its efficiency.

A tool or machine that is used for cutting things into very small pieces.

An international voyage in the course of which a ship is not more than 200 miles from a port or place where the passengers and crew could be placed safely.

Electricity supply from the shore mains when a ship is in dock undergoing repairs.

A rust preventing paint for temporary protection of steel applied immediately after blasting, generally in low thickness and before welding and other fabrication.