Maritime Terms, Abbreviations and Acronyms

Maritime abbreviations and acronyms go back to those days we used telegram and telex to communicate. The business model for telex and telegrams was “pay per letter”. Even though the telegrams and telexes have been retired, we still use the maritime abbreviations daily.

Below you will find a comprehensive list of terms, abbreviations, and acronyms used in the maritime industry, sorted in alphabetical order. You can search for an acronym or write a word and find the abbreviations where the word is included.

If you think some abbreviations are missing, send us an e-mail at post@maritimeoptima.com or open the chat icon on the bottom of this page.

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PSG

Passing

PSG or PSSG

Passing

PSI

Pounds Per Square Inch or Pre Shipment Inspection

PSI

Pounds per square inch (lbsin2). A common unit of pressure particularly vapor pressure. Some folks express pressure specifications in kPa or bars. 1.0 lbin2 = 0.068947 bar = 6.8947 kPa

PSIG

Pounds Per Square Inch Gauge

PSIX

Port State Information Exchange (USCG)

PSPC

Polystyrene Packaging Council (USA)

PSR

Perils at Sea Revision

PST

Pacific Standard Time; Per Short Ton

PSV

Platform Supply Vessel -designed to supply offshore oil platforms

PT

Port or Private Terms or Product Tanker

pt B

Port bunkers

PT or PTON

Per ton

PTC

Ports & Terminal Committee

PTO

Please turn over

PTY

Proprietary

Public Service Commission

A name usually given to a State body having control or regulation of public utilities.

Publishing Agent

Person authorized by transportation lines to publish tariffs or rates, rules, and regulations for their account.

PUFA

Poly-Unsaturated Fatty Acids. Fatty acids having two or more double bonds in their carbon chain. The most common poly-unsaturated fatty acid is linoleic acid. CH3 (CH2)4 CH = CH CH2 CH = CH(CH2)7 COOH Corn oil, sunflowerseed and soyabean oil are rich in poly-unsaturates. Poly-unsaturated fatty acids are recognised as more healthy than saturated fatty acids.

Puigs

""Pigs"" are used for cleaning pipelines. Hard pigs consist of several, usually three, discs of plastic on a central shaft. They are a close fit in the pipeline to be cleaned. They are pushed through by gas or air and evacuate any product ahead of them in the pipeline. They can also be fitted with wear compensating wire brushes when a more thorough pipe cleaning operation is required. Soft pigs consist of cylindrical plugs of foamed plastic, pushed through the pipeline in the same way.

Pulp Carrier

A vessel designed for carrying paper pulp

Pulp Temperature

Procedure where carrier tests the temperature of the internal flesh of refrigerated commodities to assure that the temperature at time of shipment conforms to prescribed temperature ranges.

Pumping Platform

A platform dedicated to pumping operations

Pup

A short semi–trailer used jointly with a dolly and another semi–trailer to create a twin trailer.

Purplefinder

Tracks, monitors and reports on remote assets. PurpleFinder® uses satellite GPS in conjunction with satellite or land-based communication services to provide global, two-way, real-time, web-access to standard and exception-based asset position reporting,

Pusher Tug

A vessel equipped to push cargo carrying barges and pontoons. May be articulated to work with specifically designed barge(s)

PVC

Polyvinyl Chloride. A polymer of vinyl chloride used to make a diverse range of cost-effective products with various levels of technical performance suited to a wide range of applications. Many of these PVC products are used everyday and include everything from medical devices such as medical tubing and blood bags, to footwear, electrical cables; packaging, stationery, and toys.

PW

Packed weight or Piece weight

PWH

Per Workable Hatch

PWHD

Per Workable Hatch Day

PWWD

Per Weather Working day

PX

Pump Room (OCIMF acronym)

PY

Py-gas

Pygas

An abbreviation of pyrolysis gasoline.

Pygas

Pyrolisis Gasoline

Pyrolisis gasoline

Pyrolysis Gasoline, or Pygas, is a naphtha-range product with a high aromatic content, used either for gasoline blending or as a feedstock for a BTX extraction unit. Pygas is produced in an ethylene plant that processes butane, naphtha or gasoil.

Pyrolysis

Application of heat to change molecular structure. The oil industry ordinarily reserves this term for processes which break hydrocarbons without the assistance of a catalyst, such as steam cracking and cooking.

Pyrolysis gasoil

The distillate fuel oil produced by a heavy liquids steam cracker. This material usually finds use as a distillate blendstock.

Pyrolysis gasoline

The aromatics-rich naphtha-range stream produced in sizeable quantities by an ethylene plant when it cracks butane, naphtha, or gasoil. Pygas resembles reformate. It can serve as a high-octane blendstock for motor gasoline or as a feedstock for an aromatics extraction unit.

Pyrophoric

A substance which ignites spontaneously upon exposure to air (or oxygen).

Peanut Oil

The oil expressed or extracted from the seed of the groundnut ("Arachis Hypogaea") after removing the husk and the germ. Groundnuts are extensively cultivated in China, India, USA and in a number of African countries, for example Senegal, Nigeria and Sudan. The plant is unusual in pushing its unripe seed into the ground, where ripening takes place. Groundnut oil is a highly prized cooking oil.

q.n.

Quotation

Q88

Questionnaire 88; Q88.com is a web based questionnaire generator that allows you to create questionnaires for vessels.

QA

Quality Assurance

QAR

Quality assurance representative (ISM)

QC

Quality at Captain's (option)

QI

Qualified Individual (OPA 90)

QLTY

Quality

QTE

Quote. The act of a charterer to make known that a ship is sought for a particular cargo or, as a shipowner, to advertise the availability of his ship for charter. Most often this activity is carried out using the services of shipbrokers.

QTTY

Quantity

QTY

Quantity

Quality Assessment

Often termed ""Quality Control"" or ""QC"", it is the measurement of chemical or physical properties to establish whether a sample conforms to specification. In manufacturing, such laboratory analyses are carried out periodically and the results are used to optimise the process. In trade, it is the basis of specifications in the contract between buyer and seller.

Quarantine

A restraint placed on an operation to protect the public against a health hazard. A ship may be quarantined so that it cannot leave a protected point. During the quarantine period, the Q flag is hoisted.

Quay

A structure attached to land to which a vessel is moored.See also Pier and Dock.

Quoin

A wedge–shaped piece of timber used to secure barrels against movement.

Quota

The quantity of goods that may be imported without restriction during a set period of time.

Quotation

An offer to sell goods at a stated price and under stated terms.

QWCT

Quay weight crane tonnage dues

QWT

Quay weight; Quay weight and Tonnage Dues

QY

Query

R of T

Range of tide

R&CC

Riots and civil commotion

R&L

Rail and lake

R&O

Rail and ocean

R+M/2

A misleading, but popular, expression of (R+M)2. See antiknock index.

R.D. or RD

Running days

R.S.V.P.

Repondez, s'il vous plait (Please reply)

R/E

Rate of exchange

R/P

Return to Port (for orders)

R/T

Round trip or Radio Telephone or Rye Terms

R/T or RT

Revenue ton

R/V OR RND

Round voyage

R/V or RND or RV

Round voyage

RA

Receivers' approval

RAC

Response Action Contractor

Rack blending

The practice of adding one or more components to a gasoline blend at an inland distribution terminal. Frequently, due to logistics, this type of blending occurs at the end of the distribution line. For instance, a supplier will add ethanol to finished gasoline while loading delivery trucks for shipment to retail outlets. This method of blending prevents ethanol, which has an affinity for water, from separating from the gasoline blend (phase separation) during transportation through a pipeline system.

Rack price

The truckload price charged by a supplier to customers which buy motor gasoline on an FOB terminal basis.

Radar Platform

A platform for operating radar equipment from

Radio Station Vessel

A vessel specifically adapted for used as a radio broadcasting station

Radioactivity

The property of some substances to emit invisible and potentially harmful radiation.

Raffinate

What remains of a reformate or pyrolysis gasoline stream after aromatics extraction. These paraffinic, naphtha-range mixtures usually have too low an octane rating for use in motor gasoline, but good properties for steam cracking. Butylene streams produced by ethylene plants also go by the name raffinate, or raff.

Rag Top

A slang term for an open–top trailer or container with a tarpaulin cover.

Rail Division

The amount of money an ocean carrier pays to the railroad for overland carriage.

Rail Grounding

The time that the container was discharged (grounded) from the train.

Rail Vehicles Carrier

A single or multi deck cargo ship with rails for the carriage of rail vehicles which are loaded via ramps

Ramp

Railroad terminal where containers are received or delivered and trains loaded or discharged. Original- ly, trailers moved onto the rearmost flatcar via a ramp and driven into position in a technique known as “circus loading.” Most modern rail facilities use lifting equipment to position containers onto the flatcars.

Ramp–to–Door

A movement where the load initiates at an origin rail ramp and terminates at a consignee’s door.

Ramp–to–Ramp

A movement of equipment from an origin rail ramp to a destination rail ramp only.

Ramsbottom carbon

A measurement of hydrocarbon mixtures' tendency to leave carbon deposits (coke) when burned as fuel or subjected to intense heat in a processing unit such as a catalytic cracker. See CONRADSON CARBON.

Rancidity

Rancidity is the development of off-odours and off-flavour in edible oils and fats or manufactured food products caused by oxidative deterioration. Primary oxidation products are odourless and tasteless but certain secondary decomposition products have particularly potent off-flavours and are detected by the palate at extremely low concentrations.

Rapeseed Oil

The oil obtained from the seeds of ""Brassica Napus"" and ""Brassica Campestris"". In common with other brassica oils such as mustard oils, rapeseed has a high content of erucic acid. Since this was found to have some adverse nutritional effects in animal feeding trials, breeding research has succeeded in producing low erucic or zero erucic acid oils. In addition, rapeseed oil contains sulphur containing chemicals which cause difficulty in processing. These have also been removed by breeding. The importance of rapeseed oil is that the crop can be grown in northerly climates such as Sweden, Germany, Poland and Canada, where other oilseeds crops do not succeed.

RAPL

Rotterdam - Amsterdam Pipeline

Rate Basis

A formula of the specific factors or elements that control the making of a rate. A rate can be based on any number of factors (i.e., weight, measure, equipment type, package, box, etc.).

Rateably

On a rateable basis. The industry uses this expression for paced delivery of product. Crude, for instance, can move from buyer to seller at some speed like a thousand barrels per day. The idea applies most naturally to pipeline-carried commodities.

Raw Materials

The primary raw materials of the oleochemicals industry are tall oil, tallow, coconut oil, palm oil, palm kernel oil, soybean oil, sunflower oil and canola oil.

RBAY

Richards Bay

RBCT

Richards Bay Coal Terminal

RBD

Refined, Bleached and Deodorised Oil. The initial letters of the words Refined, Bleached and Deodorised are used as a quality description of a fully processed oil. In Malaysia, RBD is used for a physically refined oil. After transport, RBD oils have to be re-refined before using them in the final food product.

RC

Refrigerated Container or Running Costs

RC&L

Rail, canal and lake
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