WÄRTSILÄ
Encyclopedia of Marine and Energy Technology

L

227 results

Lifeboat station

marine

A place assigned to crew and passengers where they have to meet before they will be ordered to enter the lifeboats.

Lifebuoy

marine

A ring-shaped floating life preserver. Lifebuoys are required, primarily to assist in „man-overboard” situations.

Lifecycle

energy

Meaning the full age of a process or system from creation to decline.

Life-cycle assessment

energy

Life-cycle assessment or LCA is a methodology for assessing environmental impacts associated with all the stages of the life-cycle of a commercial product, process, or service.

Life-cycle greenhouse gas emissions of energy sources

energy

Measurement of life-cycle greenhouse gas emissions involves calculating the global-warming potential of energy sources through life-cycle assessment.

Lifejacket

marine

Lifejackets are designed to provide full support for a person in water, even if that person is unable to help himself or herself and is heavily clothed.

Liferaft

marine

A rigid or inflatable raft designed to hold people abandoning ship. Liferafts are required as a back-up to lifeboats and in some small ships are allowed in lieu of lifeboats. Davit-launched liferafts or throwover inflatable liferafts are in use.

Liferaft equipment

marine

The equipment level within a liferaft is usually referred to as a “SOLAS A pack” or SOLAS B pack”. Passenger vessels engaged on short international voyages or domestic voyages, should have liferafts equipped to the level of SOLAS B pack.

Liferaft painter system

marine

A connection between the ship and the liferaft. The liferaft painter system shall be so arranged as to ensure that the liferaft when released is not dragged under by the sinking ship.

Life-saving appliances, life-saving equipment

marine

Lifeboats, liferafts, personal life-saving appliances (lifebuoys, lifejackets, immersion suits, etc).

Life-saving system

marine

The life-saving system on a ship is an extension of emergency escape routes. To develop a planned, rational life-saving system the basic phases of the problem must be examined, i.e., pre-abandonment, abandonment, survival, detection and retrieval.

Lift (force)

energy

A fluid flowing around the surface of an object exerts a force on it.

Lift coefficient

energy

The lift coefficient is a dimensionless coefficient that relates the lift generated by a lifting body to the fluid density around the body, the fluid velocity and an associated reference area.

Lift-and-roll cover

marine

A hatch cover which is lifted by hydraulic jacks, or wheel lifts, and then can roll freely to a desired position.

Lift-away cover

marine

A hatch cover lifted bodily off the coaming by a ship or shore crane to provide access to the hold.

Lifting beam

marine

A long steel beam usually constructed in “H” section or similar weight bearing construction employed to spread the load when lifting long or awkwardly shaped loads.

Lifting body

energy

A lifting body is a foil or a complete foil-bearing body such as a wind turbine blade.

Lift-to-Drag Ratio

energy

A ratio of the two aerodynamic forces, lift and drag. A high lift-to-drag ratio is required for efficient blade design.

Light

energy

Light or visible light is electromagnetic radiation within the portion of the electromagnetic spectrum that can be perceived by the human eye.

Light crude oil

energy

Light crude oil is liquid petroleum that has a low density and flows freely at room temperature.

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