Rocks & mirror
WÄRTSILÄ
Encyclopedia of Marine and Energy Technology

M

253 results

MARPOL 73/78 Annex VI, Prevention of Air Pollution from Ships

marine

Annex VI, which came into force on 19 May 2005, governs the control of the discharge of noxious substances from ship diesels. It is applicable to ship diesels with a power larger than 130kW built and installed since 1 st January 2000.

MARSEC

marine

MARSEC means Maritime Security as used by the U.S. Coast Guard to designate security levels.

MARVS

marine

The maximum allowable relief valve setting of a cargo tank, (IGC Code).

Mass

energy

Mass is both a property of a physical body and a measure of its resistance to acceleration (rate of change of velocity with respect to time) when a net force is applied. An object's mass also determines the strength of its gravitational attraction to other bodies.

Mass disease

marine

An illness preferably of an infectious nature affecting more than two persons on board at the same time.

Mass flow rate

energy

In physics and engineering, mass flow rate is the mass of a substance which passes per unit of time.

Mass spectrometry

energy

Mass spectrometry (MS) is an analytical technique that is used to measure the mass-to-charge ratio of ions.

Mass–energy equivalence

energy

In physics, mass–energy equivalence is the relationship between mass and energy in a system's rest frame, where the two values differ only by a constant and the units of measurement.

Mass-to-charge ratio

energy

The mass-to-charge ratio (m/Q) is a physical quantity that is most widely used in the electrodynamics of charged particles.

Mast

marine

A tubular steel erection, which carries various items of navigational equipment and fittings, e.g. lights, radar, etc.

Master controller

marine

A controller, which is used in a cascade control system. It provides an output which acts as a variable desired value for a slave controller.

Materials engineering

energy

The interdisciplinary field of materials science, also commonly termed materials science and engineering, covers the design and discovery of new materials, particularly solids.

Materials properties

energy

A materials property is an intensive property of some material, i.e., a physical property that does not depend on the amount of the material.

Mathematical model

energy

A mathematical model is a description of a system using mathematical concepts and language.

Matter

energy

Matter is any substance that has mass and takes up space by having volume.

Maximum ahead service speed

marine

The greatest speed the ship is designed to maintain in service at sea at the deepest seagoing draught, (acc. to SOLAS, Chapter II-1, Part A).

Maximum allowable operating pressure

energy

Maximum Allowable Operating Pressure is a pressure limit set, usually by a government body, which applies to compressed gas pressure vessels, pipelines, and storage tanks.

Maximum allowable working pressure

energy

Maximum allowable working pressure is defined as the maximum pressure based on the design codes that the weakest component of a pressure vessel can handle.

Maximum allowable working pressure of a piping system

marine

The maximum pressure of a piping system determined, in general, by the weakest piping component in the system or by the relief valve setting. The maximum allowable working pressure is not to exceed the design pressure.

Maximum continuous rating (MCR) of engine

marine

The maximum continuous rated power output as specified on the nameplate and in the Technical File of the marine diesel engine.

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