An envelope consisting of support and resistance lines of the average true price range, calculated.

Ports and Waterways Safety Act.

A device for obtaining a continuous record of stage at a point on a stream. The most common recorders consist of a float-actuated pen which traces a record on a clock driven chart.

Change of electrode potential with respect to a reference value. Often the free corrosion potential is used as the reference value. The change may be caused, for example, by the application of an external electrical current or by the addition of an oxidan ...

Term for disabled vessel that had to fall out of a convoy and thus became easy prey for submarines.

In the UK the term 'assurance' tends to be used where insurance is taken out against something which.

Seawater containing a higher concentration of dissolved salt than that of the ordinary ocean.

A term used by value investors to describe the issue of shares in a company at a price below the per.

See aneroid capsule.

Very generally, any moving- stream of air. It has no particular technical connotation.

An interior wall made of water filled containers for absorbing and storing solar energy.

Not attached to the shore or the ground in any manner. Usually, but not necessarily, moving through or making way through the water.

A device that converts the mechanical energy of rotation into electricity based on electromagnetic induction. An electric voltage (electromotive force) is induced in a conducting loop (or coil) when there is a change in the number of magnetic field lines ...

A term used by the London Stock Exchange to denote a trade generated by the system through automatic.

A small anemometer with flat vanes which indicates the number of linear feet or meters of air which have passed the instrument during its exposure.

Single Anchor Leg Mooring

(1) As a command, it means to go in the direction indicated, e.g., "Lay foward" (go up) or "Lay alow!" (come down). (2) Of a line or rope, it refers to the direction in which the strands are twisted. (3) Lay the course: able to fetch a given point when cl ...

The falling tide when the water recedes out to the sea and the water level lowers; a period or state of decline.

The ratings under which specified appliances convert energy sources into useful energy, as determined by procedures established by the U.S. Department of Energy.

Pertaining to measurements or devices in which the output varies continuously, i.e. voltage or rotation signals. Compare to digital.