ISO 5411:2024 船舶と海洋技術 | ページ 6

3.1.1

水中

水中を移動および操縦できる動力船の一種

3.1.2

有人潜水船

1 つ以上の利用可能な表面アクセス、または水中の加圧または非加圧アクセスを備えた耐圧 船体 (3.3.2) 内に 1 人以上の人を閉じ込める 潜水艇 (3.1.1)

3.1.3

繋がれた潜水艇

臍帯（3.8.1） or テザー（3.8.2） が水面に取り付けられた 潜水船 （3.1.1）、 支援船（3.8.4） または水中構造物

3.1.4

繋がれていない潜水艇

臍帯 (3.8.1) or テザー (3.8.2) のない 水中船 (3.1.1)

3.1.5

輸送用水中

有人潜水船 (3.1.2) は、レクリエーション、科学探検、救助、またはその他の目的で、水中で 乗組員 (3.11.2) に加えて貨物、設備または 乗客 (3.11.3) を移動するために設計されています。

3.1.6

乗客用潜水船

乗客を運ぶ移動船。主に水中で動作し、水面支援に依存しています。

[出典:IMO MSC/Circ. 981, 1.2.12]

3.1.7

水没救助車両

DSRV

潜水艦救難車両

SRV

有人潜水艇 (3.1.2) および 繋がれていない潜水艇 (3.1.4) は、常圧または高圧条件下で 1 つまたは複数の乾式人員移送構造を作成するために、水中嵌合インターフェースを使用して故障または遭難した潜水艦から人を避難させるために特別に設計されています。

3.1.8

ロックアウト潜水艦

有人潜水船（3.1.2） および 繋がれていない潜水船（3.1.4）。 ロックインまたはロックアウト室と、ダイバーの出入りおよび収容のためのアクセスハッチ （3.11.4） を備え、調節可能な 操作 機能を備えたもの 圧力 (3.2.8) 能力

3.1.9

曳航された潜水艦

深さと姿勢調整能力を備えた動力駆動の船によって牽引される 係留潜水船 (3.1.3)

3.1.10

大気潜水服

追加

手動操作の多関節腕および/または脚を備え、外部圧力に耐え、内圧を 1 気圧またはそれに近い圧力に維持しながら、関連する水中作業を実行できる、擬人化 され た 1 人用の係留潜水艇 (3.1.3)

3.1.11

ドライダイビングベル

有人潜水船 (3.1.2) および 係留潜水船 (3.1.3) 。半球状のフレームと、水中現場と支援船 (3.8.8.1) の甲板または 甲板圧縮室 (3.8.6) の間で人を移送するための特殊な装置が装備 されています。 4) 手術、救助、その他の目的のため

3.1.12

飽和潜水システム

ダイバーの血液と組織がすべてのガスを吸収するまでの一定期間、 ダイバー (3.11.4) が高圧にさらされる、機能的に統合された技術的手段、装置、施設の複合体。

注記 1:減圧に必要な時間は、ダイバーの血液と組織がすべてのガスを吸収した後、この高圧で一定になります。

3.1.13

海底実験室

潜水艇 (3.1.1) 現場検査を実施し、現場試験のために人や他の生物の長期的な水中生息環境をサポートするように設計された

3.2.1

life expectancy

designed number of dives that a submersible (3.1.1) can complete safely before requiring an appropriate technical engineering review of its structural integrity to ensure it can again be safely operated underwater

3.2.2

design mission time

time period for a submersible (3.1.1) from launch to recovery, when the designed mission is performed under operating conditions defined by the manufacturer

3.2.3

working time

time period which consists of design mission time (3.2.2) , excluding the processing time of the launch and recovery system (3.8.5) and the related surfacing and submerging

3.2.4

bottom time

time during which a submersible (3.1.1) is permitted to sit on seabed

3.2.5

light weight

air mass of a complete submersible (3.1.1) including all its permanently installed components, liquids and gas in machinery and piping (3.4.16) to their working levels as defined by the manufacturer, but excluding consumables, payload (3.2.6) , persons and effect

3.2.6

payload

passengers (3.11.3) from the transport submersible (3.1.5) , rescued persons from the deep submergence rescue vehicle (3.1.7) or other items carried by a submersible (3.1.1) in addition to the crew (3.11.2) , pilot (3.11.1) and permanently fitted equipment, performing the specific mission

3.2.7

operating depth

depth in metres of water (seawater or fresh water) for which a submersible (3.1.1) normally operates

3.2.8

operating pressure

pressure which a submersible (3.1.1) withstands to operate normally

Note 1 to entry: It is expressed in megapascals (MPa).

3.2.9

design depth

maximum operating depth (3.2.7) to which a submersible (3.1.1) is designed to dive safely, as measured from the surface to its keel

3.2.10

design pressure

maximum pressure which a submersible (3.1.1) can withstand to dive safely

Note 1 to entry: It is expressed in megapascals (MPa).

3.2.11

collapse depth

depth at which a submersible’s pressure-resistant structure (3.3.1) is predicted to fail, causing the pressure hull (3.3.2) to collapse

3.2.12

collapse pressure

external pressure which is liable to causing the pressure-resistant structure (3.3.1) to collapse

3.2.13

test depth

pre-determined depth used to enable safe pressure testing of the submersible (3.1.1) during manufacture and through life certification of the vessel

3.2.14

test pressure

pressure withstood by the pressure-resistant structure (3.3.1) of a submersible (3.1.1) during tests such as the tightness test (3.10.13) or the hydrostatic pressure test (3.10.14)

3.2.15

life support system

equipment and systems required to maintain a manned submersible (3.1.2) in a habitable condition in all anticipated operating conditions

[SOURCE:IMO MSC/Circ. 981, 1.2.6, modified —"the passenger submersible craft" has been replaced by"a manned submersible" in the definition.]

3.2.16

breathing air supply system

equipment providing breathing air to the manned compartment(s) (3.3.3) while a manned submersible (3.1.2) is surfaced or submerged

[SOURCE:ISO 22252:2020, 3.7, modified — ”the submersible” has been replaced by ”a manned submersible” in the definition.]

3.2.17

carbon dioxide removal

apparatus removing carbon dioxide from the pressure hull for persons within a manned submersible (3.1.2) during its underwater operation and observation

3.2.18

diving and operation training simulation system

system that can simulate the physical appearance, internal structure, underwater view, operation procedure and fault response of a submersible (3.1.1) , with a view to reducing training cost, improving training efficiency and ensuring training safety

3.3.1

pressure-resistant structure

material structure capable of withstanding external pressure from the water column in which a submersible (3.1.1) is designed to operate, or internal pressure from the pressure hull (3.3.2)

Note 1 to entry: A pressure-resistant structure includes the lock-in or lock-out chamber, viewport (3.3.4) , buoyancy material (3.3.7) and other relevant equipment.

3.3.2

pressure hull

shell capable of withstanding the internal and external design pressure (3.2.10) , in which occupants and the required equipment are housed

[SOURCE:ISO 21173:2019, 3.7, modified —"external pressure" has been replaced by"external design pressure" in the definition.]

3.3.3

manned compartment

compartment within the pressure hull (3.3.2) designed to accommodate persons inside a manned submersible (3.1.2)

3.3.4

viewport

penetration (3.3.15) in a manned submersible (3.1.2) including window (3.3.5) , flange, retaining ring, and seal (3.3.16)

[SOURCE:IMO MSC/Circ. 981, 1.2.18, modified —"the pressure boundary" has been replaced by"a manned submersible" in the definition.]

3.3.5

window

material which is a transparent, impermeable, and pressure-resistant insert in the viewport (3.3.4)

Note 1 to entry: There are several shapes of window, such as hemi-spherical window, full-scale window, model-scale window, flat window and conical window.

[SOURCE:ASME PVHO-1–2019, Appendix II]

3.3.6

medical lock

small pressure-tight chamber for transferring small items such as medicine, tools and food across the pressure hull (3.3.2) within a manned submersible (3.1.2)

3.3.7

buoyancy material

pressure-resistant material for a submersible (3.1.1) , whose density is lower than that of the operating ambient medium

3.3.8

framework

space frame structure for installing instruments and devices for a submersible (3.1.1) , such as battery enclosure (3.5.4) , releasable ballast device (3.4.5) and buoyancy material (3.3.7) , which is also the main load-carrying structure for the launch and recovery system (3.8.5) and deck lashing (3.3.20)

3.3.9

light external shell

external shell which forms a hydrodynamic shape for a submersible (3.1.1) and prevents its internal instruments and devices from surface wind and wave shock

3.3.10

guy eye

perforated metal piece located on a submersible (3.1.1) for the attachment of guy tackle

3.3.11

lashing point

point of strength, located on a submersible (3.1.1) for deck lashing (3.3.20)

3.3.12

lift point

point of strength, located on a submersible (3.1.1) for lifting during its launch and recovery process

3.3.13

bottom-sitting plate

part of a submersible's (3.1.1) structure designed to enable it to safely rest or sit on the seabed or platform

3.3.14

adhesively attached part

adhesively attached fitting

part or fitting which is bonded inside a buoyancy block by a specially formulated adhesive to facilitate assembly and disassembly of buoyancy material (3.3.7)

3.3.15

penetrator

pressure-tight penetrating structure, pipework or fitting which allows equipment, cabling and gas, air or hydraulic supplies to be inserted into the pressure-resistant structure (3.3.1) within a submersible (3.1.1)

3.3.16

seal

material or part that prevents fluid or gas leakage and ambient seawater from entering a submersible (3.1.1)

3.3.17

environmental load

expected load on a submersible (3.1.1) owing to ambient conditions such as wind speed, wind direction, wave height, current speed and water depth

3.3.18

design load

maximum expected load on a submersible (3.1.1) which consists of its own weight, associated dynamic effects and environmental load (3.3.17)

3.3.19

deformation compatibility

criteria that ensures structural elements of a submersible (3.1.1) , of different shapes and material, remain within proportional fractions of their structural strength

3.3.20

deck lashing

phenomenon that fastens a submersible (3.1.1) to the deck of a support ship (3.8.4) for transportation security

3.4.1

hydraulic powerpack

apparatus that takes the fluid as a working medium, utilises pressure energy of the fluid and drives hydraulic actuators through controlling valves and other components

3.4.2

valve pack

box with modularized integration of hydraulic control valve components for controlling pressure, flow rate and flow direction within pipes

3.4.3

buoyancy regulating device

device that controls the buoyancy of a submersible (3.1.1) , which is required for operations at any operating depth (3.2.7)

Note 1 to entry: This device includes a variable ballast device (3.4.4) , releasable ballast device (3.4.5) , and associated pipes.

3.4.4

variable ballast device

device capable of ballasting or de-ballasting water (seawater or fresh water), compensating for all loading conditions of a submersible (3.1.1)

3.4.5

releasable ballast device

device capable of decreasing the total mass of a submersible (3.1.1) , which is used for buoyancy ascent or termination of descent

3.4.6

emergency release device

releasable device capable of quickly decreasing the total mass of a submersible (3.1.1) , which is used for fast buoyancy ascent in emergencies

3.4.7

emergency buoy

buoy released to the surface in an emergency to aid a support ship (3.8.4) in locating a submersible (3.1.1)

3.4.8

explosive bolt

bolt which disengages or breaks from a designated part on account of its internal explosive burning or explosion to be unlocked or disconnected

3.4.9

trim control system

system which enables the trim of a submersible (3.1.1) to be adjusted during diving operations to optimise the configuration of a vessel in the operating environment

3.4.10

hydraulic compensator

device fitted to a hydraulic system to prevent ingress of water by compensating the system’s pressure to maintain it above ambient water pressure

3.4.11

manipulator

remotely operated work arm which is equipped on a submersible (3.1.1)

3.4.12

manipulator-held tooling

tool which is not capable of independently carrying out work and is fully dependent on a manipulator (3.4.11)

3.4.13

portable tooling

tool which is independent of a manipulator (3.4.11) and is designed to be remotely control or pre-programmed without human intervention

3.4.14

modular tooling unit

unit integrating one or several tools, which is installed on a submersible (3.1.1) when required for use, and is fully dependent on manual control

3.4.15

sampling basket

platform which stores a site sample or modular tooling unit (3.4.14) during working time (3.2.3)

3.4.16

piping

device which is an assembly of pipes, pipe straps and associated components providing technical support for realization functions of other apparatuses of a submersible (3.1.1)

3.5.1

battery cell

basic unit for the interconversion of chemical and electrical energy, usually consisting of electrodes, diaphragm, electrolyte, housing and terminals, and which is designed to be rechargeable

3.5.2

battery module

combination of more than one secondary cell (3.5.1) , by series connection, parallel connection or series-parallel connection and used as a power supply

3.5.3

battery management system

BMS

system that monitors the status of the battery (e.g. temperature, voltage, state of charge) and can provide communication, safety, secondary cell (3.5.1) balancing and management control for the battery, as well as communication interface for applications

3.5.4

battery enclosure

assembly containing a battery module (3.5.2) , battery management system (3.5.3) and corresponding components, with mechanical connection, electrical connection and protection

3.5.5

battery pack

rechargeable device, usually consisting of a battery module (3.5.2) , battery management system (3.5.3) , battery enclosure (3.5.4) and corresponding accessories (e.g. cooling components and connecting cables)

3.5.6

battery system

energy storage system consisting of one or more battery packs (3.5.5) and corresponding accessories (e.g. management system, high-voltage circuit, low-voltage circuit, temperature controller and mechanical assembly)

3.5.7

power battery system

battery system (3.5.6) designed to supply the power system and high-power equipment of a submersible (3.1.1)

3.5.8

auxiliary battery system

control battery system

battery system (3.5.6) designed to supply low-power equipment of a submersible (3.1.1) , such as computers, sensors and controllers

3.5.9

oil-immersed battery

battery system (3.5.6) , whose battery enclosure (3.5.4) is filled with hydraulic oil to provide a suitable working environment for its battery module (3.5.2) , ensuring power supply of a submersible (3.1.1) as defined by the manufacturer

3.5.10

wireless charging technology

technology developed for transmitting energy and data through a magnetic field between a battery module (3.5.2) and its charger without wire connection

3.5.11

power distribution unit

equipment used to control and distribute electrical power during operation in non-fault condition, which is designed to automatically or manually isolate an electrical power circuit fault to enable continued operation for a submersible (3.1.1) as far as possible given that a fault occurred

3.5.12

junction box

box which aggregates and transfers signals of power supply, control and detection from every electrical device, providing access interface for watertight connectors

3.5.13

ground fault circuit interrupter

GFCI

device which is attached to the topside AC power source having receptacles, any of which can be attached to underwater cables supplying power to a submersible (3.1.1) and its equipment

[SOURCE:IMCA D 057 Rev. 1.1, Clause 1, modified — “tools or lighting” has been replaced by"a submersible and its equipment" in the definition.]

3.5.14

underwater camera

device which uses the standard industry capture camera enclosed in a pressure housing wired with watertight connectors

3.5.15

pan-tilt

support platform with a function such as a horizontal pitch or rotation to extend the field of view of an underwater camera (3.5.14) when mounted

3.5.16

lighting

lights which consist of external lights and internal lights on a submersible (3.1.1) , providing lighting for underwater camera (3.5.14) and persons within the manned compartment (3.3.3) during an underwater operation

3.5.17

thruster

device which provides a submersible (3.1.1) with directional thrust power for manoeuvring

Note 1 to entry: A thruster usually consists of an electric motor, propeller, nozzle, fairing and control unit.

3.6.1

beacon

colloquial term for a transponder or other seabed unit that transmits acoustic ranges or data

[SOURCE:IMCA D 057 Rev. 1.1, Clause 1]

3.6.2

pinger

beacon (3.6.1) which is set to transmit at a fixed and regular interval

[SOURCE:IMCA D 057 Rev.1.1, Clause 1, modified —"acoustic beacon" has been replaced by"beacon" in the definition.]

3.6.3

responder

beacon (3.6.1) which, upon receiving an electrical trigger supplied via a cable or another external connecting link, replies after a short-fixed time delay after the interrogation signal

[SOURCE:IMCA D 057 Rev. 1.1, Clause 1, modified — ”umbilical” has been replaced by “another external connecting link ” in the definition.]

3.6.4

underwater acoustic transducer

device for the exchange of acoustic and electrical energy in water

3.6.5

underwater sound projector

underwater acoustic transducer (3.6.4) , which converts an electrical signal into an acoustic signal to be emitted into water

3.6.6

hydrophone

underwater acoustic transducer (3.6.4) , which converts a received acoustic signal into an electrical signal

3.6.7

underwater acoustic communication device

device which is designed to establish a real-time communication link between a manned submersible (3.1.2) and a support ship (3.8.4) through instruction codes, audio, text messages and site photos

3.6.8

underwater telephone

device which is designed to establish a real-time communication link between a manned submersible (3.1.2) and a support ship (3.8.4) through audio

3.6.9

underwater sound positioning system

USPS

system based on the propagation of an acoustic wave in water, providing the function of positioning

3.6.10

ultra-short baseline acoustic positioning system

USBL acoustic positioning system

underwater sound positioning system (3.6.9) in which an array of acoustic transducers (3.6.4) is deployed on a support ship (3.8.4) and transducers are all built into a single transceiver assembly

3.6.11

long baseline acoustic positioning system

LBL acoustic positioning system

underwater sound positioning system (3.6.9) which consists of a number of acoustic transponder beacons moored in fixed locations on the seabed or mounted on fixed locations of objects such as a support ship (3.8.4)

3.6.12

ranger

mechanically scanning single-beam sonar which senses obstacles and locates major anomalies surrounding a submersible (3.1.1)

3.6.13

imaging sonar

fan-shaped sonar beam which scans surfaces at shallow angles, usually through an angle in the horizontal plane, and displays colour images or pictures

3.6.14

bathymetric side scan sonar

BSSS

surveying and mapping device, which is designed to investigate seabed micro topography during near-bottom swimming (3.9.1) and draw a three-dimensional map of the scene in real time

3.6.15

doppler velocity log

DVL

acoustic instrument which is based on the Doppler effect to acquire its submerged speed relative to the seabed and flow field data in the scene

3.7.1

manoeuvring control

function which controls the underwater three-dimensional motion of a submersible (3.1.1) by taking associated information data as input parameters, such as navigation, trajectory and attitude

3.7.2

rudder

device that controls the yaw of a submersible (3.1.1) underwater by using the hydrodynamic forces acting on its rudder blade

3.7.3

horizontal control plane

device that controls the pitch of a submersible (3.1.1) underwater by using the hydrodynamic forces acting on its surface

3.7.4

stabilizing fin

stationary device with an airfoil section, which improves motion stability of a submersible (3.1.1)

3.7.5

inertial navigation system

INS

system whose operating sensor is an inertial measurement unit made up of three accelerometers and three gyros for measuring acceleration and rotational velocity for dead reckoning in subsea environments

3.7.6

global positioning system

GPS

radio navigation system that allows land, sea and airborne users to determine their exact location, velocity and time, 24 hours a day in all weather conditions, anywhere in the world

[SOURCE:IMCA D 057 Rev. 1.1, Clause 1]

3.7.7

altimeter

device known as a single beam echo sounder for measuring the height of a submersible (3.1.1) relative to the seabed

3.7.8

depth gauge

device for measuring the depth of a submersible (3.1.1) relative to the surface

3.7.9

conductivity, temperature, depth sensor

CTD sensor

detecting instrument for measuring the temperature and salinity at different depths of water

3.7.10

level sensor

pressure sensor that measures the level of liquids

3.7.11

leak sensor

sensor based on the principle that liquid can be conductive by applying electrodes to detect water

3.8.1

umbilical

external connecting link of a tethered submersible (3.1.3) , which should consist of life support hoses, surveillance, communication, remote control, power supply cables and load-carrying elements (ropes) for the launch and recovery system (3.8.5)

3.8.2

tether

external connecting link of a tethered submersible (3.1.3) , connecting a tethered submersible (3.1.3) to its tether management system (3.8.3) , or connecting a tethered submersible (3.1.3) to its support ship (3.8.4) , which should consist of communication, remote control and power supply cables excluding load-carrying elements (ropes) for the launch and recovery system (3.8.5)

3.8.3

tether management system

TMS

underwater system for storing, deploying and retracting tether (3.8.2) , which is designed to reduce additional drag and interference for a tethered submersible (3.1.3) operation, caused by a support ship (3.8.4) swing and current influence acting on tether (3.8.2)

3.8.4

support ship

ship capable of housing, handling operation, rescue and maintenance of a submersible (3.1.1) and accommodation of persons on board, being engaged in related support work while a submersible (3.1.1) operates at a designated place underwater

3.8.5

launch and recovery system

LARS

system supporting launch, recovery and other handling operations of a submersible (3.1.1)

Note 1 to entry: This system consists of cranes, booms, masts, frames, davits, foundations, winches, as well as associated mechanical, piping (3.4.16) and electrical systems, as necessary for the intended operations.

3.8.6

deck compression chamber

DCC

transfer chamber of a support ship (3.8.4) used in association with a submersible (3.1.1) , which allows for gas saturation, lodging, recovery and desaturation periods for divers (3.11.4) and disabled submarine survivors

3.8.7

mating device

device which is designed for a pressure-tight connection of a deep submergence rescue vehicle (3.1.7) , lock-out submersible (3.1.8) or a dry diving bell (3.1.11) to a deck compression chamber (3.8.6) , enabling the transfer of persons under conditions of continuous high-gas medium pressure

3.8.8

control module

control compartment

position in a submersible (3.1.1) or a support ship (3.8.4) where the control of the submersible (3.1.1) is conducted and where the essential indicators, controls, navigation devices, positioning devices, monitoring devices and communications are arranged

3.9.1

near-bottom swimming

mode in which a submersible (3.1.1) can be manoeuvred to make a lateral and longitudinal movement while approaching the seabed

3.9.2

hovering

mode in which a submersible (3.1.1) can hold position at a fixed angle to the ocean current relative to the seabed in the specified environment

3.9.3

auto-pilot

mode in which the computing system of a submersible (3.1.1) takes charge of motion control (3.7.1) without anthropogenic intuition, normally including auto-heading control (3.9.4) , auto-speed control (3.9.5) , auto-depth keeping (3.9.6) and auto-height keeping (3.9.7)

3.9.4

auto-heading control

computer-controlled mode to maintain the designated heading relative to the seabed

3.9.5

auto-speed control

computer-controlled mode to maintain the designated speed relative to the seabed

3.9.6

auto-depth keeping

computer-controlled mode to maintain the designated depth relative to the surface

3.9.7

auto-height keeping

computer-controlled mode to maintain the designated height above the seabed

3.9.8

bottom sitting

mode in which a submersible (3.1.1) can be manoeuvred to lay on the seabed for a long-term or short-term period

3.9.9

swarmed operation

multiple unmanned submersibles (3.1.3) operating simultaneously in the same water space under managed control to enable coordinated, concurrent underwater operations to be conducted

3.10.1

initial survey

survey including a complete and thorough examination of a submersible (3.1.1) , which ensures full compliance with the applicable provisions of associated rules and guidelines before formal operation (3.10.2)

3.10.2

formal operation

initial moment for a submersible (3.1.1) going into service when all design specifications and other operation conditions, such as sea state, are achieved

3.10.3

full operational capability

FOC

status when a submersible (3.1.1) is capable of filling its full range of designed operational capabilities

3.10.4

routine maintenance

routine upkeep, repair, refill and replacement of components required to keep a submersible (3.1.1) in full working order for operational diving activities, such as gas and battery system (3.5.6) charging, replacement of consumables and upload/download of system software

3.10.5

overhaul

full or partial deep maintenance procedure designed to return the equipment to its full designed operational functionality

3.10.6

annual survey

survey completed every year to examine the material state of a submersible (3.1.1) to assess its condition and confirm it is materially safe to operate for the next twelve-month period

3.10.7

dry-docking survey

survey including a complete and thorough examination of a submersible (3.1.1) , which ensures full compliance with the applicable provisions of associated rules and guidelines after a specified time interval since the formal operation (3.10.2) of the submersible (3.1.1)

3.10.8

special survey

survey which undertakes to examine a submersible (3.1.1) when substantial change happens, such as a support ship (3.8.4) being changed, or main parts being damaged or altered

3.10.9

decommission

technical condition in which a submersible (3.1.1) is beyond its life expectancy (3.2.1) or cannot be repaired to achieve its operational requirement

3.10.10

extend life

technical means for extending life expectancy (3.2.1) in response to different degradation phenomena after long-term usage

3.10.11

human-closed test

testing of the life support system (3.2.15) which involves accommodating persons within the pressure hull (3.3.2) under a given condition for a given time interval in accordance with the designated procedure for its performance

Note 1 to entry: The elements measured in this test are breathing air supply, carbon dioxide absorption, temperature and humidity control.

3.10.12

loading test

testing of the framework (3.3.8) by applying multiple load cases in accordance with the designated procedure to simulate the load acted on a submersible (3.1.1) during the design mission time (3.2.2)

3.10.13

tightness test

testing of the pressure-resistant structure (3.3.1) , welds, joints or piping (3.4.16) by applying internal working gas at medium pressure or hydrostatic pressure equal to test pressure (3.2.14) in accordance with the designated procedure for leakage

3.10.14

hydrostatic pressure test

testing of the pressure-resistant structure (3.3.1) by applying external test pressure (3.2.14) in accordance with a designated procedure in a test chamber to simulate resisting ambient pressure while a submersible (3.1.1) is working underwater

3.10.15

continuous pressurization and depressurization test

hydrostatic pressure test (3.10.14) in which the pressurization rate and depressurization rate keep the same values without any pause for strain measurement

[SOURCE:ISO 21173:2019, 3.12, modified — “test” has been replaced by “hydrostatic pressure test” in the definition. ]

3.11.1

pilot

person appointed and qualified to command a submersible (3.1.1)

3.11.2

crew

person other than the pilot (3.11.1) tasked to operate certain equipment within a manned submersible (3.1.2) and to exit from a lock-out submersible (3.1.8) underwater when necessary

3.11.3

passenger

every person other than the pilot (3.11.1) and crew (3.11.2) within a transport submersible (3.1.5) , who has no formal role in the operation of the submersible (3.1.1)

3.11.4

diver

person tasked to carry out diving operations from or within a submersible (3.1.1) either in a submersible’s hyperbaric chamber and/or in water during a diving operation

3.11.5

operations manager

person who is responsible for assembling a large number of assets, persons and organizations to undertake diving operation during design mission time (3.2.2)

3.11.6

dynamic positioning operator

DPO

person qualified to hold a dynamic positioning watch for the dynamic positioning of a support ship (3.8.4) on which they are embarked