ISO 10303-216:2003

INTERNATIONAL ISO
STANDARD 10303-216
First edition
2003-08-01
Industrial automation systems and
integration — Product data
representation and exchange
Part 216:
Application protocol: Ship moulded
forms
Systèmes d'automatisation industrielle et intégration — Représentation
et échange de données de produits —
Partie 216: Protocole d'application: Formes moulées de navires

Reference number
©
ISO 2003
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ii © ISO 2003 — All rights reserved

Contents Page
1 Scope . 1
2 Normative references . 3
3 Terms, definitions and abbreviations . 4
3.1 Terms defined in ISO 10303-1 . 4
3.2 Terms defined in ISO 10303-31 . 5
3.3 Terms defined in ISO 10303-42 . 6
3.4 Other terms and definitions . 6
3.5 Abbreviations . 13
4 Information requirements . 13
4.1 Units of functionality . 14
4.1.1 basic_geometry . 15
4.1.2 configuration_management . 15
4.1.3 definitions . 16
4.1.4 external_references . 16
4.1.5 hull_class_applicability . 17
4.1.6 hydrostatics . 17
4.1.7 items . 18
4.1.8 location_concepts . 18
4.1.9 offset_table_representations . 19
4.1.10 ship_design_parameter . 20
4.1.11 ship_general_characteristics . 20
4.1.12 ship_measures . 21
4.1.13 ship_moulded_forms . 21
4.1.14 surface_representations . 22
4.1.15 wireframe_representations . 22
4.2 Application objects . 23
4.3 Application assertions . 163
5 Application interpreted model . 180
5.1 Mapping specification . 180
5.2 AIM EXPRESS short listing . 394
6  Conformance requirements . 601
Annex A (normative) AIM EXPRESS expanded listing . 612
Annex B (normative) AIM short names . 788
Annex C (normative) Implementation method specific requirements . 797
Annex D (normative) Protocol Implementation Conformance Statement (PICS) proforma . 798
Annex E (normative) Information object registration . 800
Annex F (informative) Application activity model . 801
Annex G (informative) Application reference model . 828
Annex H (informative) AIM EXPRESS-G . 854
Annex J (informative) Computer interpretable listings . 881
Annex K (informative) Application protocol usage guide . 882
Annex L (informative) Technical discussions . 883
Bibliography . 900
Index . 901
Fi gur e s
Figure 1 — Shipbuilding application protocols . x
Figure 2 — Data planning model . xii
Figure 3 — Ship moulded forms overview . 1
Figure 4 — Bilge keel . 26
Figure 5 — Shaft bossings . 27
Figure 6 — Shaft strut . 28
Figure 7 — Shaft struts . 29
Figure 8 — Keel dimensions . 33
Figure 9 — Dimensions of the bulbous bow . 35
Figure 10 — Global axis placements . 58
Figure 11 — Transverse meta- centre . 68
Figure 12 — Measuring shell thickness . 70
Figure 13 — Local coordinate system . 74
Figure 14 — Midship tumble . 76
Figure 15 — Ship hull with bulbous bow and thruster tunnels . 79
Figure 16 — Ship hull with bulbous bow . 83
Figure 17 — Bulkheads and decks . 84
Figure 18 — Double bottom . 85
Figure 19 — Outer and inner bottom with profiles . 85
Figure 20 — Double ship hull . 86
Figure 21 — Frames and decks . 87
Figure 22 — Girders . 88
Figure 23 — Rudder and propeller . 89
Figure 24 — Screw propeller model . 89
Figure 25 — Thruster . 90
Figure 26 — Decks and superstructure . 90
Figure 27 — Transom stern . 91
Figure 28 — Transverse bulkheads . 91
Figure 29 — Vertical axis propeller . 102
Figure 30 — Vertical axis propeller technology . 103
Figure 31 — Propeller location . 104
iv © ISO 2003 — All rights reserved

Figure 32 — Propeller dimensions . 105
Figure 33 — Controllable propeller blade . 108
Figure 34 — Fixed propeller blade . 109
Figure 35 — Ducted propeller . 110
Figure 36 — Controllable screw propeller . 112
Figure 37 — Rudder dimensions . 114
Figure 38 — Ship curves . 119
Figure 39 — Buttock lines . 120
Figure 40 — Station lines . 122
Figure 41 — Waterlines . 122
Figure 42 — Ship hull, rudder and propeller . 126
Figure 43 — Ship hull dimensions . 128
Figure 44 — Ship points . 130
Figure 45 — Ship types . 141
Figure 46 — Ship types . 142
Figure 47 — Spacing position . 146
Figure 48 — Surface representation . 151
Figure 49 — Thruster propeller . 152
Figure 50 — Form stability . 153
Figure 51 — Wireframe . 159
Figure F.1 — IDEF0 Basic notation . 801
Figure F.2 — Node A0 - moulded form life cycle . 814
Figure F.3 — Node A0 - perform ship life cycle . 815
Figure F.4 — Node A1 - specify ship . 816
Figure F.5 — Node A12 - prepare bid . 817
Figure F.6 — Node A122 - create preliminary design . 818
Figure F.7 — Node A1221 - create preliminary hull form . 819
Figure F.8 — Node A12214 - generate initial hull form definition . 820
Figure F.9 — Node A1223 - estimate hydrodynamics and powering . 821
Figure F.10 — Node 12231 - estimate resistance and powering . 822
Figure F.11 — Node A2 - complete and approve ship design . 823
Figure F.12 — Node A22 - finalize and approve hull form . 824
Figure F.13 — Node A23 - finalize and approve hydrodynamics and powering . 825
Figure F.14 — Node A3 - produce and inspect a ship. 826
Figure F.15 — Node A34 - test ship . 827
Figure G.1 — ARM EXPRESS-G diagram 1 of 25. 829
Figure G.2 — ARM EXPRESS-G diagram 2 of 25. 830
Figure G.3 — ARM EXPRESS-G diagram 3 of 25. 831
Figure G.4 — ARM EXPRESS-G diagram 4 of 25. 832
Figure G.5 — ARM EXPRESS-G diagram 5 of 25. 833
Figure G.6 — ARM EXPRESS-G diagram 6 of 25. 834
Figure G.7 — ARM EXPRESS-G diagram 7 of 25. 835
Figure G.8 — ARM EXPRESS-G diagram 8 of 25. 836
Figure G.9 — ARM EXPRESS-G diagram 9 of 25. 837
Figure G.10 — ARM EXPRESS-G diagram 10 of 25. 838
Figure G.11 — ARM EXPRESS-G diagram 11 of 25. 839
Figure G.12 — ARM EXPRESS-G diagram 12 of 25. 840
Figure G.13 — ARM EXPRESS-G diagram 13 of 25. 841
Figure G.14 — ARM EXPRESS-G diagram 14 of 25. 842
Figure G.15 — ARM EXPRESS-G diagram 15 of 25. 843
Figure G.16 — ARM EXPRESS-G diagram 16 of 25. 844
Figure G.17 — ARM EXPRESS-G diagram 17 of 25. 845
Figure G.18 — ARM EXPRESS-G diagram 18 of 25. 846
Figure G.19 — ARM EXPRESS-G diagram 19 of 25. 847
Figure G.20 — ARM EXPRESS-G diagram 20 of 25. 848
Figure G.21 — ARM EXPRESS-G diagram 21 of 25. 849
Figure G.22 — ARM EXPRESS-G diagram 22 of 25. 850
Figure G.23 — ARM EXPRESS-G diagram 23 of 25. 851
Figure G.24 — ARM EXPRESS-G diagram 24 of 25. 852
Figure G.25 — ARM EXPRESS-G diagram 25 of 25. 853
Figure H.1 — application context - AIM diagram 1 of 26 in EXPRESS-G . 855
Figure H.2 — product definition - AIM diagram 2 of 26 in EXPRESS-G . 856
Figure H.3 — property definition - AIM diagram 3 of 26 in EXPRESS-G . 857
Figure H.4 — representation - AIM diagram 4 of 26 in EXPRESS-G . 858
Figure H.5 — action - AIM diagram 5 of 26 in EXPRESS-G . 859
Figure H.6 — person and organization - AIM diagram 6 of 26 in EXPRESS-G . 860
Figure H.7 — person and organization assignment - AIM diagram 7 of 26 in EXPRESS-G . 861
Figure H.8 — approval - AIM diagram 8 of 26 in EXPRESS-G . 862
Figure H.9 — date and time - AIM diagram 9 of 26 in EXPRESS-G . 863
Figure H.10 — classification assignment and group - AIM diagram 10 of 26 in EXPRESS-G . . . 864
Figure H.11 — identification assignment external source - AIM diagram 11 of 26 in EXPRESS-G
........................................................................ 865
Figure H.12 — document - AIM diagram 12 of 26 in EXPRESS-G . 866
Figure H.13 — measure with unit - AIM diagram 13 of 26 in EXPRESS-G . 867
Figure H.14 — measure value - AIM diagram 14 of 26 in EXPRESS-G . 868
Figure H.15 — geometric and topological representation - AIM diagram 15 of 26 in EXPRESS-G
........................................................................ 869
Figure H.16 — point - AIM diagram 16 of 26 in EXPRESS-G . 870
Figure H.17 — placement - AIM diagram 17 of 26 in EXPRESS-G . 871
Figure H.18 — curve - AIM diagram 18 of 26 in EXPRESS-G . 872
Figure H.19 — bounded curve - AIM diagram 19 of 26 in EXPRESS-G . 873
Figure H.20 — surface - AIM diagram 20 of 26 in EXPRESS-G . 874
Figure H.21 — elementary surfaceAIM diagram 21 of 26 in EXPRESS-G . 875
Figure H.22 — bounded surface - AIM diagram 22 of 26 in EXPRESS-G . 876
Figure H.23 — solid model and shell - AIM diagram 23 of 26 in EXPRESS-G . 877
Figure H.24 — topology - AIM diagram 24 of 26 in EXPRESS-G . 878
Figure H.25 — name attribute and role association - AIM diagram 25 of 26 in EXPRESS-G . 879
Figure H.26 — id and description attribute - AIM diagram 26 of 26 in EXPRESS-G . 880
Figure L.1 — Ship Product Model . 884
Figure L.2 — Structure of this part of ISO 10303 . 885
Figure L.3 — Modeling framework . 888
Figure L.4 — Life cycle concept . 889
Figure L.5 — Redeclaration of attributes . 889
Tabl es
Table 1 — Key mappings for AP216 . 181
Table 2 — Conformance classes . 602
vi © ISO 2003 — All rights reserved

Table 3 — Conformance class elements . 602
Table B.1 — AIM short names of entities . 788
Table L.7 — ARM measures and corresponding AIM measures and units . 891
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO
member bodies). The work of preparing International Standards is normally carried out through ISO technical
committees. Each member body interested in a subject for which a technical committee has been established has the right
to be represented on that committee. International organizations, governmental and non-governmental, in liaison with
ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all
matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the
technical committees are circulated to the member bodies for voting. Publication as an International Standard requires
approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO
shall not be held responsible for identifying any or all such patent rights.
ISO/IEC 10303-216 was prepared by Technical Committee ISO/IEC/TC 184, Industrial automation systems and
integration, Subcommittee SC 4, Industrial data.
This International Standard is organized as a series of parts, each published separately. The structure of this International
Standard is described in ISO 10303-1.
Each part of this International Standard is a member of one of the following series: description methods, implementation
methods, conformance testing methodology and framework, integrated generic resources, integrated application
resources, application protocols, abstract test suites, application interpreted constructs, and application modules. This part
is a member of the 200 series.
A complete list of parts of ISO 10303 is available from the Internet:

viii © ISO 2003 — All rights reserved

Introduction
ISO 10303 is an International Standard for the computer-interpretable representation of product
information and for the exchange of product data. The objective is to provide a neutral mechanism
capable of describing products throughout their life cycle. This mechanism is suitable not only for neutral
file exchange, but also as a basis for implementing and sharing product databases, and as a basis for
archiving.
This part of ISO 10303 is a member of the application protocol series. This part of ISO 10303 specifies
an application protocol (AP) for ship moulded forms and related hydrostatic properties.
The definition of ship moulded forms supports the geometrical representation of the ship hull, propellers,
rudders, appendages, and internal structures of the ship.
This part of ISO 10303 is one of a series of shipbuilding application protocols, that together aim to
provide an integrated computer interpretable product model for ships.
The series of shipbuilding application protocols assumes that the ship product model can be divided into
separate ship systems that each covers a key element of the ship for its whole life cycle. These key
elements are: ship moulded forms, ship arrangements, ship distribution systems, ship structures, ship
mechanical systems, ship outfit and furnishings, and ship mission systems. Each separate system is
described by one or more application protocols. The full series of shipbuilding application protocols is
shown in Figure 1 . Those aspects of the ship product model that are common to each shipbuilding
application protocol are described consistently and identically in each application protocol. Annex L has
additional information on the shipbuilding application protocols and their elements. It also contains
information on data common to the shipbuilding application protocols.
Within the series of shipbuilding application protocols this part of ISO 10303 details the geometry of a
ship moulded form.
A moulded form is the shape and a set of design parameters of different parts of the ship that does not
include information on the thickness of the material from which it is constructed. A moulded form may
describe a ship hull, propeller, rudder, appendage, deck, or a ship structural element such as a bulkhead.
A moulded form of particular interest is the ship hull, which is referred to as the hull moulded form. The
hull moulded form will be exchanged between companies during the initial design and it is the basis of
hydrostatic calculations.
All moulded forms are covered by this part of ISO 10303, and a collection of moulded forms that
describe the ship as a whole is termed a ship moulded form.
This application protocol satisfies an industrial need of reducing the time required for hull form design,
performance prediction, and ship structural design by facilitating the electronic exchange of hull moulded
form geometry and hydrostatics between different companies. Also, it satisfies an industrial need for
individual companies to integrate computer applications by providing an electronically accessible
common view of hull and internal ship geometry for ship design and manufacture.
The fundamental assumptions for ship moulded forms are:
— ship moulded form and each moulded form have a definition;
— the definitions are approved and versioned;
— a ship moulded form is associated with a ship and is composed of moulded forms;
— a moulded form provides a geometric representation for a ship.
Figure 1 — Shipbuilding application protocols
The representations that are described reflect the different input and output capabilities of CAD, CAM,
and other software systems in common usage of the shipbuilding process.
The geometric representations supported are:
— offset table representation;
— wireframe representation;
— surface representation.
All geometric representations assume no knowledge of the thickness of the ship moulded form. All
measurements are based on one set of units defined for the ship. Geometric representations are used to
x © ISO 2003 — All rights reserved

describe a hull surface moulded form or other moulded surfaces of the ship.
The hydrostatic properties are considered as a particular type of lifecycle definition for a moulded form.
The hydrostatic properties are those of the intact hull that depend on the ship's draught, such as
displacement, centre of buoyancy, and centre of flotation. Damage stability is not covered since no
information on ship compartmentation is described by this application protocol.
NOTE ISO 10303-215 maybe used to represent damage stability data.
This application protocol defines the context, scope, and information requirements for the exchange of
ship moulded form definitions, geometric representations, related hydrostatic properties, and specifies
the integrated resources necessary to satisfy these requirements.
Application protocols provide the basis for developing implementations of ISO 10303 and abstract test
suites for the conformance testing of AP implementations.
Clause 1 defines the scope of the application protocol and summarizes the functionality and data covered
by the AP. Clause 3 lists the words defined in this part of ISO 10303 and gives pointers to words defined
elsewhere. An application activity model that is the basis for the definition of the scope is provided in
Annex F. The information requirements of the application are specified in Clause 4 using terminology
appropriate to the application. A graphical representation of the information requirements, referred to
as the application reference model, is given in Annex G.
Resource constructs are interpreted to meet the information requirements. This interpretation produces
the application interpreted model (AIM). This interpretation, given in 5.1, shows the correspondence
between the information requirements and the AIM. The short listing of the AIM specifies the interface
to the integrated resources and is given in 5.2. The definitions and EXPRESS provided in the integrated
resources for constructs used in the AIM may include select list items and subtypes which are not
imported into the AIM. The expanded listing given in Annex A contains the complete EXPRESS for the
AIM without annotation. A graphical representation of the AIM is given in Annex H. Additional
requirements for specific implementation methods are given in Annex C.
Figure 2 contains the data planning model that provides a high level description of the requirements for
this application protocol. This planning model was created from the in-scope data from the activities of
the application activity model (AAM) and grouped into logical units of functionality. This planning
model is used as a guide in developing the application reference model (ARM).
Figure 2 — Data planning model
xii © ISO 2003 — All rights reserved

INTERNATIONAL STANDARD ISO 10303-216:2003(E)

Industrial automation systems and integration —
Product data representation and exchange —
Part 216:
Application protocol: Ship moulded forms
1 Scope
This part of ISO 10303 specifies the scope and information requirements for the exchange of ship
moulded form definitions, geometric representations, and related hydrostatic properties.
NOTE 1 The application activity model in Annex F provides a graphical representation of the processes and
information flows which are the basis for the definition of the scope of this part of ISO 10303.
NOTE 2 An overview of the AP Ship Moulded Forms is given in Figure 3.
Figure 3 — Ship moulded forms overview
The following are within the scope of this part of ISO 10303:
— definition of moulded form geometry related to commercial and naval ships;
— definition of moulded form geometry of the preliminary design, detailed design, and production
stages of the life cycle of a ship;
— definition of moulded form geometry that describe the hull moulded form of the ship, including mono
hullforms, multi-hullforms, the bulbous bow, transom stern, thruster tunnels, and additional appendages;
EXAMPLE 1  Types of moulded form geometry are bilge keel, spray rails, shaft struts, and shaft bossings that are
part of the final moulded form of the ship hull.
— definition of moulded form geometry that describe the moulded form of propellers and rudders;
— definition of moulded geometry that describe the moulded form of decks including camber and sheer;
— definition of moulded geometry of internal ship compartment boundaries and the moulded form
geometry of ship structural and non-structural elements;
EXAMPLE 2  Bulkheads, girders, and profiles are examples of moulded form geometry of ship structural elements.
— definition of general characteristics;
EXAMPLE 3  Main dimensions, ship type, shipyard, ship owner, and classification data are examples of general
characteristics.
— definition of design parameters for the ship hull, bulbous bow, propeller, rudder, and appendages that
are necessary to describe the moulded form, and are required to calculate hydrostatic properties;
— definition of hydrostatic properties of the ship moulded form that depend on the draught of the ship;
EXAMPLE 4  Displacement, centre of buoyancy, centre of flotation, metacentric height, and cross curves of stability
are example of hydrostatic properties.
— definition of global and local co-ordinate systems and spacing tables used in naval architecture for
position purposes;
— shape definition of ship moulded forms that use one of the following specified types of geometric
representation:
— offset table representation;
— wireframe representation;
— surface representation.
— geometric representations containing geometric elements used in naval architecture;
EXAMPLE 5  Waterlines and buttock lines are examples of geometric representations.
— version control and approval of moulded forms and related hydrostatics.
2 © ISO 2003 — All rights reserved

The following are outside the scope of this part of ISO 10303:
— product definition data related to hull plating defined on the moulded form;
— product definition data related to ship compartmentation and ship arrangements;
NOTE 3  ISO 10303-215 may be used to represent ship compartmentation and arrangement data.
— product definition data related to ship structures and ship assemblies;
NOTE 4  ISO 10303-218 may be used to represent ship structures such as panel systems.
— product definition data related to ship machinery and ship superstructures;
— mechanical systems and material aspects of propellers, rudders and control surfaces;
— product definition data from the decommissioning stage of the ship life cycle;
— hydromechanic properties of the ship;
— damage stability properties of ships;
NOTE 5  ISO 10303-215 may be used to represent damage stability data.
— ship longitudinal strength.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 31 (all parts), Quantities and units
ISO 1000:1992, SI units and recommendations for the use of their multiples and of certain other units
ISO 10303-1:1994,  Industrial automation systems and integration — Product data representation and
exchange — Part 1: Overview and fundamental principles
ISO/IEC 8824-1:1998, Information technology — Abstract Syntax Notation One (ASN.1): Specification
of basic notation
ISO 10303-11:1994, Industrial automation systems and integration — Product data representation and
exchange — Part 11: Description methods: The EXPRESS language reference manual
ISO 10303-21:2002, Industrial automation systems and integration — Product data representation and
exchange — Part 21: Implementation methods: Clear text encoding of the exchange structure
ISO 10303-22 :1998, Industrial automation systems and integration — Product data representation and
exchange — Part 22: Implementation methods: Standard data access interface
1)
ISO/TS 10303-28 — , Industrial automation systems and integration — Product data representation
and exchange — Part 28: Implementation methods: XML representation of EXPRESS schemas and data
ISO 10303-31:1994, Industrial automation systems and integration — Product data representation and
exchange — Part 31: Conformance testing methodology and framework: General concepts
ISO 10303-41:2000, Industrial automation systems and integration — Product data representation and
exchange — Part 41: Integrated generic resource: Fundamentals of product description and support
ISO 10303-42:2000, Industrial automation systems and integration — Product data representation and
exchange — Part 42: Integrated generic resource: Geometric and topological representation
ISO 10303-43:2000, Industrial automation systems and integration — Product data representation and
exchange — Part 43: Integrated generic resource: Representation structures
ISO 10303-45:1998, Industrial automation systems and integration — Product data representation and
exchange — Part 45: Integrated generic resource: Materials
ISO 10303-501:2000,  Industrial automation systems and integration — Product data representation and
exchange — Part 501: Application interpreted construct: Edge-based wireframe
ISO 10303-508:2001,  Industrial automation systems and integration — Product data representation and
exchange — Part 508: Application interpreted construct: Non-manifold surface
ISO 10303-511:2001, Industrial automation systems and integration — Product data representation
and exchange — Part 511: Application interpreted construct: Topologically bounded surface
RFC 2396:1998, Uniform Resources Identifiers (URI): Generic Syntax
3 Terms, definitions and abbreviations
3.1 Terms defined in ISO 10303-1
For the purposes of this document, the following terms defined in ISO 10303-1 apply.
— application;
— application activity model (AAM);
1)
To be published.
4 © ISO 2003 — All rights reserved

— application context;
— application interpreted model (AIM);
— application object;
— application protocol (AP);
— application reference model (ARM);
— conformance class;
— conformance requirement;
— data;
— data exchange;
— implementation method;
— information;
— integrated resource;
— interpretation;
— PICS proforma;
— product;
— product data;
— unit of functionality (UoF).
3.2 Terms defined in ISO 10303-31
For the purposes of this document, the following terms defined in ISO 10303-31 apply.
— conformance testing;
— postprocessor;
— preprocessor.
3.3 Terms defined in ISO 10303-42
For the purposes of this document, the following terms defined in ISO 10303-42 apply.
— boundary;
— connected;
— curve.
3.4 Other terms and definitions
For the purposes of this document, the following terms and definitions apply.
NOTE Several of the following definitions have been adapted from Principles of Naval Architecture, Second
Edition [10].
3.4.1
after perpendicular; aft perpendicular
a vertical plane at the intersection of the summer load (design) waterline with the after side of the rudder
post (stern post), the centreline of the rudder stock if there is no rudder post, or the transom
NOTE For a ship with a transom stern it is the intersection of the design waterline with the transom.
3.4.2
amidships; midship
a vertical plane arranged transversely in the (y,z) direction of the global coordinate system, located either
at half of the distance between the after perpendicular and the forward perpendicular, or midway between
the ends of the design waterline
3.4.3
appendage
an exterior attachment, addition, or adjunct to the ship’s hull
3.4.4
baseline
the main horizontal reference plane at or near the bottom of the ship from which heights are measured
in design and production
NOTE  Baseline is measured zero vertically.
3.4.5
bilge
the rounded portion of a ship’s hull plating that connects the bottom to the sides
3.4.6
bilge keel
a fin fitted on the bilge of the ship to reduce rolling
6 © ISO 2003 — All rights reserved

3.4.7
breadth
the largest transverse measurement from one side of the ship’s hull to the other side, ignoring the
thickness of hull plating
NOTE The breadth is the widest transverse moulded dimension of the hull surface, not including possibly wider
structure in the the ship’s superstructure.
3.4.8
bulkhead
vertical wall or partition within a ship
NOTE Bulkheads are often designated by their location, use, kind of material, or method of fabrication.
3.4.9
buttock line
any longitudinal line that is parallel to the centre line of the ship
NOTE An element of the hullform representing the intersection of a vertical longitudinal plane with the hull surface
of a ship.
3.4.10
camber
a planar curve that defines the curvature of a deck in the transverse direction. Decks are built with
camber to allow the runoff of rainwater or seawater
NOTE  A positive value of a camber would mean that the deck at side is lower than the deck at centerline.
3.4.11
centreline
an imaginary line that results from the intersection of the centreplane with the moulded form
NOTE  This is the main reference datum line used during design and production from which all transverse
measurements are taken.
3.4.12
centreplane
a vertical plane arranged longitudinally in the (x,z) direction of the global coordinate system that passes
through the point at half of moulded breadth amidships
NOTE This is the main reference datum plane used during design and production from which all transverse
measurements are taken and divides the ship from bow to stern into port and starboard sides.
3.4.13
centroid
the centre of an item, area, or volume measured with respect to some defined location
3.4.14
classification
the process of ensuring that a ship is designed, built, and maintained to a prescribed standard
NOTE This is accomplished by a classification society or the owner of the ship through approval of the design,
inspection of the the construction, and periodic surveys of the ship during operations.
3.4.15
classification society
an organization that enhances the safety of life and property at sea by providing rules, regulations, and
personnel for assessing and classifying ships during their life cycle
3.4.16
configuration management
version control, design organization and classification society approval status, and product model change
management for the ship’s product model data
3.4.17
coordinate system; co_ordinate_system; co ordinate system:
a reference system that associates a unique set of parameters with each point in an n-dimensional space
3.4.18
deck
a vertical division of the internal space of a ship, equivalent to the function of a floor in a building
NOTE A deck may extend completely over or only partially across the ship. Likewise it may extend over the entire
length of the ship or only over selected portions of the length. Deck designations are often derived by their location
or their functional purpose.
3.4.19
deck house
a comparatively light structure, above the hull, that does not extend from side to side of the ship
NOTE It commonly is composed of spaces that are used for crew accommodations and control of the ship.
3.4.20
depth
the vertical distance between the ship's baseline and a horizontal level in the ship
3.4.21
fair
a smooth curve without irregularities
3.4.22
fin
a small projecting surface or attachment to the ship’s hull
3.4.23
form parameters, hullform parameters
empirical mathematical equations, coefficients, cross-sectional areas, and volumes of the ship
8 © ISO 2003 — All rights reserved

NOTE They are used to analyze the expected performance, stability, resistance and powering requirements of a ship
design.
3.4.24
forward perpendicular
the vertical plane at the intersection of the summer load (design) waterline with the fore side of the stem
profile
NOTE This is often used as a reference point for measurements or locating items longitudinally on the ship.
3.4.25
frame
one of the transverse members that make up the rib-like skeleton part of the ship
NOTE  Frames act as stiffeners, holding the outside plating in shape and maintaining the transverse form of the ship.
3.4.26
furnishings
items that are placed in the habitable spaces of the ship to provide sleeping, living, and work support for
the passengers and crew
EXAMPLE Bunks, lockers, furniture, galley equipment are considered furnishings.

3.4.27
general arrangements
the subdivision of the ship into compartments and zones for ship operation, machinery spaces, crew and
passenger habitation and support, and passageways
3.4.28
half-breadth
a transverse dimension taken from the centreplane
NOTE Because of the port and starboard symmetry of a ship’s hull, many naval architectural calculations and
drawings reflect only one-half of the hull and are assumed to be mirrored across the centreplane.
3.4.29
hullform
the collection of geometry that defines the shape of the hull of the ship
NOTE In some naval architecture references the hullform is considered to include the uppermost watertight deck
of the ship. For the purposes of this part of ISO 10303, the hull surface and uppermost watertight deck are defined
as separate moulded form objects.
3.4.30
hydrodynamic
forces resulting from the flow of liquid around a ship
3.4.31
hydrostatics
forces acting on a ship in still water as a result of air and water pressure on the outside under-water part
of the ship
3.4.32
hydrostatic property
empirical mathematical equations, locations of centres of gravity and bouyancy, cross-sectional areas,
and volumes of the ship that are used to analyze the expected stability of a ship under various loading
conditions and at various drafts
NOTE For a list of property types see 4.2.47.1.
3.4.33
knuckle
the meeting of any two surfaces of a ship at an angle that is not a continuous curve or a plane
NOTE A hullform element representing a mathematical 1st order (tangency) discontinuity between adjoining
portions of the hullform, such as a chine.
3.4.34
length between perpendiculars
the horizontal distance measured longitudinally between the forward and aft perpendiculars
3.4.35
longitudinal
a measurement along the length of a ship
NOTE In the ship global coordinate system defined in this part of 10303, longitudinal dimensions are along the X
axis.
3.4.36
main dimensions
principal geometric measurements of the hullform that are used in analysis and design
NOTE For a list of principal measurements see 4.2.78.
3.4.37
mid-body
for those ships with a parallel portion, the part of the hullform between the aft-body and the fore-body
EXAMPLE Tankers have a parallel mid-body portion, but Naval ships seldom have a parallel mid-body.
3.4.38
moulded form
the shape and significant design parameters for different parts of the ship that does not include
information on the thickness of the material from which the parts are constructed
NOTE A moulded form may describe a ship hull, propeller, rudder, appendage, deck, superstructure, or the surface
underlying a ship structural element such as a bulkhead.
10 © ISO 2003 — All rights reserved

3.4.39
offset
the coordinate value of a point (height and half-breadth) on the intersection line of an orthogonal plane
with a ship moulded form
NOTE The offset is used to define the distance to the centre plane, or the distance to amidships if the plane lies in
the longitudinal direction.
3.4.40
outfit, outfitting
items that are permanently attached to the ship but that are not part of
...