Technical Terms

AHT AHTS AV AWB bareboat charter
barge BASSnet
BHP bollard pull
crude oil OCR or day-rates deadweight ton ne or DWT
deepwater The area on the main deck behind the living quarters on the OSV
Anchor handling tug vessel
Anchor handling tug and supply vessel
Accommodation vessel
Accommodation workboat vessel
A charter where the charterer is provided a vessel but without the crew. The charterer is responsible for bearing the finance costs and all operational, maintenance, commercial and statutory requirements (set by the fiag state of a vessel in accordance with the prevailing laws of the country) of the vessel
A flat-bottomed steel vessel used for the transportation of cargoes or for accommodation
A computer-based system for planning and reporting maintenance activities, and performing material administration and stock purchasing
Barrel, a unit of measure for oil and petroleum products. One barrel is equivalent to about 158.987 litres
Brake horse power
A measure of the static pull of a vessel which is used to describe the pulling capacity of towing vessels, such as AHTS and AHT
The senior crewman of the deck department and is responsible for assisting the Chief Officer with the vessel’s deck maintenance and cargo operation
In admiralty law, refers to restrictions on the provision of services and the shipment of goods or carriage of passengers between two points within a country by a vessel registered in another country, effectively reserving domestic shipping activities to a country’s own flagged vessels. Permission to engage in cabotage is, in general, strictly restricted in every country
A mixture of naturally occurring hydrocarbons that has yet to be refined
Daily charter rates or the amount of money it costs to hire a vessel for a day
A measure of how much weight a vessel is engineered and designed to carry. It is the sum of the weight of cargo, fuel, fresh water, ballast water, provisions and crew
Water depths of 500m and more DP1 or DP Class One DP2 or DP Class Two DP3 or DP Class Three drilling rig
FCB floatovers
FPSO Aspects of the oil and gas industry that relate to refining and distribution
Dynamic positioning, a computer-controlled system to automatically maintain a vessel’s position and heading by using its propellers and thrusters. The dynamic positioning level (e.g. DP1, DP2, DP3) indicates the degree and redundant systems which are back-up systems to ensure continuous operation
Dynamic positioning level with one set of position reference and no back-up system
Dynamic positioning level with two independent position reference and one back-up system
Dynamic positioning level with at least three independent position reference and two back-up systems
A structure that has the capability to drill wells
A narrow basin, usually made of earthen beams and concrete, closed by gates, into which a vessel may be floated and the water pumped out, leaving the vessel supported by blocks
The process by which a vessel is raised and placed on concrete blocks for inspection, repair and maintenance on its hull and flat bottom
Diving support vessel
Enhanced oil recovery is a generic term for techniques used for increasing the amount of crude oil that can be extracted from an oil field. It is sometimes referred to as “improved oil recovery” or “tertiary recovery”
Fast crew boat, a vessel of less than 500 gross tonnage, generally used for personnel transfer
A process where a structure is loaded onto a submersible vessel or barge and is then towed to offshore location, etc.. Once in position, the submersible vessel or barge is ballasted/filled with sea water so that it will slowly sink, leaving the structure floating in the water. The AHT/AHTS will then tow and position the floating structure to its final intended position
A vessel, with similar or superior specifications as compared to the vessel as stated in the contract, chartered-in as a replacement or substitute, prior to the availability of the vessel
Floating production storage and offloading HLV HSE huli
ISM or ISM Code
MSV A non-magnetic compass in which the direction of true north is maintained by a continuously driven gyroscope, which is a device to indicate the actuai true north, whose axis is paraliel to the earth’s axis of rotation
Heavy lift vessel
Health, safety and environment
The main frame or body of a vessel without the verticai steel structure erected on the centre-line of the vessel and structures that are build on the main frame or body of a vessei
International oil companies, which refers to large private or public oil companies that have upstream, midstream and downstream capabilities, such as Shell and Exxonmobil
Inspection, maintenance and repair, which refers to the function of carrying out maintenance activities of underwater infrastructure in the offshore environment
International Safety Management Code, which is a code set out to provide an international standard for the safe management and operation of ships and for poliution prevention
International Ship and Port Facility Security Code, which is a code set out to provide an international standard for the detection of security threats and preventive measures against security incidents affecting ships or port facilities used in international trade
Liquefied natural gas
Length overall, the maximum length of a huli measured parallel to the waterline
Square meter
International Convention for the Prevention of Poliution from Ships
Marine Audit and Task System
Million barrels of oil equivalents
Million barrels of oil equivalents per day
Aspects of the oil and gas industry relating to transport and trading
The process of securing a vessel to a berth
Multi-purpose vessel OSV
Planned Maintenance System
pure-play OSV provider
ROV rudders
seismic survey
ship management
Special Action Team
SSV stern stern roller
tcm National oil companies, which refers to oil and gas companies owned or controlled by a national government, typically having special rights or access to its local market
Offshore support vessel (includes AHT, AHTS, AWB, FCB, PSV, SSV and UV) of which the main function is to support the offshore oil and gas operations, which includes movement of equipment or structures, as well as transportation of materials and personnel
A computer based system which assists our staff to carry out periodic maintenance
A maritime vessel used in the construction of subsea infrastructure
The driving force of a vessel which typically involves engine and propeller systems
Production sharing contract
Platform supply vessel
A company solely involved in the operation of OSVs and not involved in any other activities in the oil and gas value chain
Remotely operated vehicle
A flat piece hinged vertically near the stern of a boat or ship for steering
Studies done to gather and record patterns of induced shock wave reflections from underground layers of rock which are used to create detailed models of the underlying geological structure
The administration, operations and general management of a ship, including technical operations, repair, maintenance, crewing and insurance
International Convention for the Safety of Life at Sea
Our in-house maintenance team which conducts search and repair operations both at sea and whilst vessels are at port
Straight supply vessel
The rear end of a ship
A large cylindrical roller fitted at the stern edge of an offshore tug’s after cargo deck to allow various awkward and heavy objects such as chains, anchors, hoses, etc. to be hauled onboard without causing excessive damage to the stern
Trillion cubic meters time charter
tonne or ton tonnage upstream
winch Usually one or more propellers fitted below the vessei’s wateriine at the forward part of the vessel to provide iateral thrust. For OP vessels, similar thrusters will also be fitted at the stern of the vessel
A charter whereby a vessel owner provides a vessei to a customer and is responsible for all finance costs and operating expenses except for fuel costs, which are borne by the charterer
A metric ton or tonne which is equivalent to 1,000 kiiograms or 2,204.6 pounds
A measure of the size or cargo capacity of a ship, and a “ton” is a unit of such measure
Aspects of the oil and gas industry relating to exploration and production
Utility vessel
A rotating machine with one or more drums for towing or moving objects using steel wires, ropes, cabies or chains
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