2H

Second Half

3PL

Third Party Logistics - a company that provides logistics services to other companies for some or all of their logistics needs. It typically includes warehousing and transportation services. Most 3PL's also have freight forwarding licenses.

AA

Always afloat.

A.A.

always afloat

AAAA

Always accessible - always afloat.

AAOSA

Always afloat or safe aground. The condition for a vessel whilst in port.

AAR

Abbreviation for: 1) Against All Risks (insurance clause). 2) Association of American Railroads.

AARA

Amsterdam-Antwerp Rotterdam Area

A & A'S

Alterations and additions to the structure, rigging and equipment of a warship.

A AXIS

The angle that specifies the rotation of a machine tool about the x axis. abandon

AB

Certificated and experienced seaman ranked above ordinary seaman.

ABACK

When a wind hits the front of the sails forcing the vessel astern.

ABAFT

Toward the stern, relative to some object ('abaft the fore hatch').

ABAFT OF THE BEAM

Bearings over the beam to the stern, the ships after sections.

ABAFT THE BEAM

Any direction between broad on the beam and astern. See also FORWARD OF THE BEAM

ABAMPERE

The unit of current in the centimeter gram-second electro- magnetic system. The abampere is 10 amperes.

ABANDON

To jettison cargo.

ABANDON SHIP

To forsake a vessel in favour of the life rafts, life boats.

ABANDON SHIP ALARM

seven short sound signals followed by a long sound signal.

ABANDON VESSEL

To evacuate a vessel from crew and passengers following a distress

ABATE

Diminish, stop.

ABATEMENT

A discount allowed for damage or overcharge in the payment of a bill.

ABATTOIR

A building in which cattle or other animals are slaughtered.

ABEAM

On the beam, a relative bearing at right angles to the ship's keel.

A.B.E.C.

Annular Bearing Engineering Committee. Used as prefix for tolerance grades of bearings as set up by this committee.

ABERRATION

  1. The apparent displacement of a celestial body in the direction of motion of the earth in its orbit caused by the motion of the earth combined with the finite velocity of light. When, in addition to the combined effect of the velocity of light and the motion of the earth, account is taken of the motion of the celestial body in space during the interval that the light is traveling to the earth from the luminous body, as in the case of planets, the phenomenon is termed planetary aberration. The aberration due to the rotation of the earth on its axis is termed diurnal aberration or daily aberration. The aberration due to the revolution of the earth about the sun is termed annual aberration. The aberration due to the motion of the center of mass of the solar system in space is termed secular aberration but is not taken into account in practical astronomy.
  2. The convergence to different foci, by a lens or mirror, of parallel rays of light. In a single lens having spherical surfaces, aberration may be caused by differences in the focal lengths of the various parts of the lens: rays passing through the outer part of the lens come to a focus nearer the lens than do rays passing through its central part. This is termed spherical aberration and, being due to the faulty figure of the lens, is eliminated by correcting that figure. A lens so corrected is called an aplanatic lens. Aberration may also result from differences in the wavelengths of light of different colors: light of the shorter wavelengths (violet end of the spectrum) comes to a focus nearer the lens than light of the longer wavelengths (red end of the spectrum). This is termed chromatic aberration, and is practically eliminated over a moderate range of wavelengths by using a composite lens, called an achromatic lens, composed of parts having different dispersive powers.

ABERRATION CONSTANT

The measure of the maximum angle between the true direction and the apparent direction of a celestial body as observed from earth due to aberration. It has a value of 20.496 seconds of arc. The aberration angle depends upon the ratio of the velocity of the earth in its orbit and the velocity of light in addition to the angle between the direction of the light and the direction of motion of the observing telescope. The maximum value is obtained when the celestial body is at the pole of the ecliptic.

ABI

U.S. Customs 'Automated Broker Interface' by which brokers le importers' entries electronically.

ABJK ENTROPY

Function of the state of a thermodynamic system whose change in any differential reversible process is equal to the heat absorbed by the system from its surroundings divided by the absolute temperature of the system. Also known as thermal charge.

ABLATION

Wasting of snow or ice by melting or evaporation

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