% CORREL

The percentage of peaks in the used oil infrared spectrum which match those in the reference oil. A sudden decrease in this value usually means that the oil was mixed with a different type.

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.

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

A CODE FLAG

1) Diver below, keep well clear at slow speed. 2) A flag + three numerals: Azimuth or bearing.

A-COCK-BILL

A term used to indicate that the anchor is clear of the hawse pipe and suspended above the water, ready for letting go.

A-HOY

Used to attract the attention of another vessel.

A-HULL

When a vessel lies perpendicular to the wave fronts. A method of heaving to.

A-LEE

Away from the direction from where the wind comes from.

A-MAST

An A-shaped arrangement of upright poles for supporting a mechanism designed to lift heavy loads.

A-SCAN

In ultrasonic testing, a method of data presentation on a CRT with the horizontal baseline indicating distance or time and the vertical deflections from the baseline indicating amplitude of the ultrasonic reflection.

A-TRACE

The first trace of an oscilloscope having more than one displayed

A. CLASS

Australian vessel survey class, unlimited offshore.

A. CLASS DIVISION

Divisions made of steel or equivalent material, suitably stiffened and capable of preventing the passage of smoke and flame up to the end of the first 1 hour of the standard fire test.

A.A.

always afloat

A.B.E.C.

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

A.B.S.

American Bureau of Shipping classification society.

A.C. CURRENT

Alternating current is a form of pulsing electricity supplied by alternators. The voltage cycles between positive and negative at a regulated frequency (cycles per second measured in Hertz).

A.C.M.A.

Australian Communication & Media Authority

A.C.O.

Aircraft coordinator - a person who coordinates the involvement of multiple aircraft in SAR operations.

A.C.S.

U.S. Customs' master computer system, 'Automated Commercial Systems.' Now being replaced by the Automated Commercial Environment system.

A.F.B.M.A.

The Anti-Friction Bearing Manufacturers Association. They have set up standards for the bearing industry.

A.F.F.F.

Aqueous Film Forming Foam

A.G.D.

Australian geodetic datum.

A.G.D.66

Australian Geodetic Datum 1966 - the datum used by the Australian Hydrographical Office on Australian Charts which is a different datum used by the GPS. See also WGS84'

A.G.M.A.

Abbreviation for 'American Gear Manufacturers Associations', an organization serving the gear industry.

A.G.W.

All going well.

A.H.D.

Australian Height Datum adopted by the National Mapping Council for vertical control for mapping (mean sea level 1966-68).

A.H.L.

Australian hold ladders.
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