Maximum expected operating pressure (MEOP) is the highest expected operating pressure.

A technique used commonly with wind turbines and photovoltaic solar systems to maximize power extraction under all conditions.

A radio distress call.

A measure of volume denoting one thousand cubic feet of natural gas equal to 28.3168 cubic metres.

The MD (measured depth; also along hole depth) of a well describes the length of the borehole, which is normally larger than the true vertical depth.

The mean radiant temperature is defined as the uniform temperature of an imaginary enclosure in which the radiant heat transfer from the human body is equal to the radiant heat transfer in the actual non-uniform enclosure.

The ratio of the accumulated operating time for a sample of parts to the total number of failures in the sample, for specified conditions of operation.

Means for rapidly recovering survivors from water and transferring them from rescue units or survival craft to the ship, (mandatory for each ro-ro passenger ship).

Measurement is the quantification of attributes of an object or event, which can be used to compare with other objects or events.

Measurement category is a method of classification by the International Electrotechnical Commission (IEC) of live electric circuits used in measurement and testing of installations and equipment, usually in the relation within a building (residential or industrial).

A measurement tower or met mast is a free standing tower or a mast, which carries measuring instruments with meteorological instruments such as thermometers and instruments to measure windspeed.

A measuring instrument is a device to measure a physical quantity.

Mechanical advantage is a measure of the force amplification achieved by using a tool, mechanical device or machine system.

A mechanical drum brake or disk brake is used to stop turbine in emergency situation such as extreme gust events or over speed.

Mechanical efficiency is a dimensionless number that measures the effectiveness of a machine in transforming the power input to the device to power output.

In physical sciences, mechanical energy is the sum of potential energy and kinetic energy.

Mechanical heat treatment is an alternative waste treatment technology.

The failure or fracture of a product or component as a result of a single event is known as mechanical overload.

A shaft sealing arrangement fitted to pumps in place of a stuffing box and gland packing assembly.

A mechanism is a device that transforms input forces and movement into a desired set of output forces and movement.