ASTM F1808-03(2008)
(Guide)Standard Guide for Weight Control Technical Requirements for Surface Ships
Standard Guide for Weight Control Technical Requirements for Surface Ships
SIGNIFICANCE AND USE
It is important to know the amount of weight and its location before the ship is built to be sure that when it is built it will have positive stability. Only through detailed weight estimating in the design stage and during construction can one be ensured that positive stability will be achieved and retained.
SCOPE
1.1 This guide provides recommended weight control technical requirements for surface ships and discusses different types of weight estimates, reports, and weight control procedures. It contains a weight classification that will assist in achieving uniformity by standardizing the weight-reporting system.
1.2 This guide is applicable to ships designed and constructed in inch-pound units of measurement and to ships designed and constructed in SI units of measurement. Whenever inch-pound units are shown or referred to in the text, or in example formats included in this guide, it is to be understood that corresponding SI units may be substituted if applicable to a ship designed and constructed in SI units, provided that whichever system is used, it is consistently used in all weight control reporting documentation for the ship.
General Information
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Designation: F1808 − 03(Reapproved 2008) An American National Standard
Standard Guide for
Weight Control Technical Requirements for Surface Ships
This standard is issued under the fixed designation F1808; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope shipdesigninformation,forexample,specifications,drawings,
and so forth, available at the time of award.
1.1 This guide provides recommended weight control tech-
nical requirements for surface ships and discusses different
3.1.2 as-built weight and center of gravity estimate, n—a
types of weight estimates, reports, and weight control proce-
detailed final estimate of light ship weight and centers of
dures. It contains a weight classification that will assist in
gravity data, adjusted for inclining experiment results, reflect-
achieving uniformity by standardizing the weight-reporting
ing the as-built ship including the net effect of contract
system.
modifications.
1.2 This guide is applicable to ships designed and con-
3.1.3 center of gravity, n—the point through which the
structed in inch-pound units of measurement and to ships
resultant of all gravitational forces on a ship or a component
designed and constructed in SI units of measurement. When-
passes.Thelocation,abalancepoint,atwhichtheentireweight
everinch-poundunitsareshownorreferredtointhetext,orin
of a ship may be considered to be concentrated.
example formats included in this guide, it is to be understood
3.1.4 deadweight, n—the total carrying capacity of a ship
that corresponding SI units may be substituted if applicable to
a ship designed and constructed in SI units, provided that including weight of cargo, fuel, lubricating oil, fresh water in
whichever system is used, it is consistently used in all weight tanks, stores, passengers and baggage, and crew and their
control reporting documentation for the ship.
effects.
3.1.5 inclining experiment, n—a procedure performed on a
2. Referenced Documents
completed, or almost completed, ship to establish experimen-
2.1 ASTM Standards:
tally the light ship values of the displacement and the vertical,
F1321Guide for Conducting a Stability Test (Lightweight
longitudinal, and transverse positions of its center of gravity
Survey and Inclining Experiment) to Determine the Light
(see Guide F1321 for detailed procedures).
Ship Displacement and Centers of Gravity of a Vessel
3.1.6 independent weight and center of gravity estimate,
F1332Practice for Use of SI (Metric) Units in Maritime
n—the estimate of light ship weight and centers of gravity
Applications (Committee F25 Supplement to IEEE/
performed by the shipbuilder shortly after award of the
ASTM SI 10)
shipbuilding contract based on the ship design information
3. Terminology available at the time of award. When compared with the
owner’s estimate and upon resolution of differences, an agreed
3.1 Definitions:
upon weight and center of gravity estimate will result.
3.1.1 agreed weight and center of gravity estimate, n—an
estimate of light ship weight and centers of gravity data,
3.1.7 light ship weight, n—theweightoftheshipwithallits
mutually agreed upon between the owner and the shipbuilder
equipment and outfit, including permanent (fixed) solid or
shortly after award of the shipbuilding contract, based on the
liquid ballast, spare parts that are carried on board, water in
boilers at operating levels, machinery including Marine Sani-
tation Device units in working condition, lubricating oil in all
This guide is under the jurisdiction of ASTM CommitteeF25 on Ships and
machinery, but not in storage tanks, and liquids in all piping
Marine Technology and is the direct responsibility of SubcommitteeF25.07 on
systems.
General Requirements.
CurrenteditionapprovedMay1,2008.PublishedJuly2008.Originallyapproved
3.1.8 longitudinal center of gravity (LCG), n—the point
in 1997. Last previous edition approved in 2003 as F1808–03. DOI: 10.1520/
F1808-03R08.
throughwhichthegravitationalforcesonashippass,measured
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
longitudinally from amidships, measured from the forward
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
perpendicular,orinsomecases,measuredfromtheaftperpen-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. dicular.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F1808 − 03 (2008)
3.1.9 transverse center of gravity (TCG), n— the point it will have positive stability. Only through detailed weight
throughwhichthegravitationalforcesonashippass,measured estimating in the design stage and during construction can one
transversely, port or starboard, from the ship’s centerline. beensuredthatpositivestabilitywillbeachievedandretained.
3.1.10 vertical center of gravity (KG or VCG), n—the point
6. Procedure
throughwhichthegravitationalforcesonashippassmeasured
vertically from the keel (K) or the ship’s baseline. 6.1 Aspecified number of calendar days, that is, 30, 45, 60,
or 90 after date of award, as specified by the owner, the
3.1.11 weigh; to weigh, v—as commonly understood in
shipbuilder should submit for agreement an independent
everyday usage and in the maritime industry, and as used
weight and center of gravity estimate. This estimate should
throughout this guide, means to determine by measuring the
describe the weight and centers of gravity of the ship in
mass of.
comprehensive detail and should include summaries and work
3.1.12 weight, n—as commonly understood in everyday
sheets showing the detailed work performed, for example,
usageandinthemaritimeindustry,andasusedthroughoutthis
calculations and estimates based on the design information,
guide, is synonymous with mass. In this guide, weight in
drawings, specification, and so forth. Appendix X1 contains
inch-pound units is measured in pounds and in long tons of
suggestedformsfortheindependentestimate,anditincludesa
2240 lbs; and in SI units (metric), weight is measured in
suggested weight classification system for the estimate. Terms
kilograms and in metric tons of 100 kg. Refer to Practice
used in the weight classification are defined in the Maritime
F1332 for conversion factors to convert inch-pound quantities
Administration Publication, Classification of Merchant Ship
toSI(metric)quantitiesforunitsofweight,moment,moments
Weights.
to trim, and so forth.
6.2 A mutual agreement between the shipbuilder and the
3.1.13 weightclassification,n—thesystemusedinlightship
owneronthelightshipweightandcentersofgravityshouldbe
weight estimating for grouping materials, equipment, or com-
reached as quickly as possible after award of the shipbuilding
ponents of the ship in a structured order to facilitate compari-
contract. Agreement action should consist of a review of
son and to ensure completeness.
shipbuilder’s independent weight and center of gravity esti-
3.1.14 weight group, n—one of the three major elements of
mates and comparison with the owner’s estimate. Upon reso-
light ship weight as used in the weight classification, that is,
lution of differences, an agreed upon weight and center of
hull structure, outfit, and machinery.
gravity estimate will result. Thereafter, the shipbuilder should
beresponsibleforobtaininginthecompletedvesseltheagreed
4. Summary of Guide
upon weight and center of gravity characteristics adjusted for
4.1 Determination of Weight and Moment Data—The
authorized departures from the contracted ship design, re-
weight and moment data for all components and material and
flected in the agreed upon estimate.
their overall effect on the ship’s weight, center of gravity, list,
6.3 Departures from the contracted ship design, reflected in
and trim should be determined. As ship design or ship
the agreed upon estimate, which affect the light ship weight
construction drawings are prepared and as material is selected,
and centers of gravity, should not be undertaken until the
acquired, or received, the weight and centers of gravity of all
shipbuilder has submitted to the owner his estimate of the
itemsthatcomprisetheshipshouldbedeterminedandreported
effectonweightandcentersofgravityoftheshipandobtained
in the weight estimates and reports. These data may be
written approval to proceed with the department. Departures,
obtained by estimation or calculation during preliminary and
which have a total impact on any weight group of less than a
contract design, by a combination of estimation or calculation
specified percentage, that is, 0.01, 0.02, 0.03, or 0.04% of the
of ship construction drawings, and by actual weight determi-
light ship weight, may be considered negligible and will not
nation of items during detail design and construction.
require written approval with respect to weight.
4.2 Weight Reporting and Control —The procedures for
6.4 The shipbuilder should submit periodically, as agreed
weight reporting and control, regardless of the level of report-
upon, to the owner, a tabulation of approved departures and
ing,aredescribedinSection6andapplyforcommercialships.
their cumulative effect on weight and centers of gravity of the
The method and frequency of weight reporting can vary
agreed light ship estimate. In addition, when submitting plans
depending on the specific ship design, as well as the technical
that involve departures from the type of construction in the
requirements set forth in the contract. The extent and level of
contractedshipdesign,reflectedintheestimate,theshipbuilder
weight control also can vary depending on the specific ship
should itemize such departures and their effect on light ship
design.Althoughtheweightcontroltechnicalrequirementsfor
weight and centers of gravity in his periodic reports. A final
commercial ships usually are less demanding than those for
report should be submitted at the time of delivery adjusted to
U.S. Navy surface ships, the need for a mechanism to control
bringtheestimatedlightshipweightandcentersofgravityinto
the weight of a ship still exists. Sections S1–S4 describe the
reasonable agreement with the inclining experiment results.
specific weight control technical requirements for U.S. Navy
surface ships.
5. Significance and Use U.S. Department of Transportation, Maritime Administration Classification of
Merchant Ship Weights, January 1985. Available from the U.S. Maritime Admin-
5.1 It is important to know the amount of weight and its
istration,OfficeofShipConstruction,MAR720,400SeventhSt.,SW,Washington,
location before the ship is built to be sure that when it is built DC 20590.
F1808 − 03 (2008)
7. Keywords
7.1 light ship; ship acquisition; weight control; weight
estimate; weight report
SUPPLEMENTARY REQUIREMENTS
The following supplementary requirements shall apply only when specified by the purchaser in the
contract or purchase order. These requirements normally are invoked for U.S. Navy Surface Ships.
S1. SPECIAL GOVERNMENT REQUIREMENTS S2.2 accepted weight estimate (AWE), n—theAWE defines
the weight and centers of gravity of a ship that was awarded
S1.1 Government Documents, Drawings, and Publications
under a specification-type contract using the information that
—The following government documents, drawings, and pub-
was available at the time of contract award. It establishes
licationsformapartofthisguidetotheextentspecifiedherein.
contractual values for weight and KG and is the baseline for
Unless otherwise specified, the issues are those cited in the
detail design and construction.
solicitation.
S2.3 acquisition margins, n—acquisition margins are
S1.1.1 Naval Sea Systems Command (NAVSEA) Docu-
weight and KG allowances included in the weight estimate to
ments:
cover the inherent limits of precision and the undefined
0900-LP-039-9020 Ship Work Breakdown Structure for
variationsofcomponentweightandcentersofgravitythattake
Nuclear Propulsion Plant (U)
placethroughoutthedesignphasesandduringtheconstruction
S9040-AA-IDX-010/SWBS 5D, Expanded Ship Work
of a ship. To provide for adequate weight control and configu-
Breakdown Structure, Vol I
ration control, acquisition margins are divided into five ac-
S9040-AA-IDX-020/SWBS 5D, Expanded Ship Work
counts: preliminary design margin, contract design margin,
Breakdown Structure, Vol II
detail design and building margin, contract modification mar-
S1.2 Nongovernment Publications—The following docu-
gin, and government-furnished material (GFM) margin.
ment(s) form a part of this guide to the extent specified herein.
S2.4 actual weight, n—actual weight is the value obtained
Unlessotherwisespecified,theissuesofthedocuments,which
by a measurement of material on an accurate scale or other
are DOD adopted, are those listed in the issue of the Depart-
weighing device.
ment of Defense Index of Specifications and Standards
(DODISS) cited in the solicitation. Unless otherwise specified,
S2.5 allocated baseline weight estimate (ABWE), n—the
theissuesofdocumentsnotlistedintheDODISSaretheissues ABWE is the contractor’s definition of the weight and centers
of the documents cited in the solicitation (see S4.1).
ofgravityofashipthatwasawardedunderaperformance-type
S1.2.1 ANSI Document:
contract at the time of hull and propulsion configuration
X3.4 Code for Information Interchange
approval. It is the baseline for detail design and construction.
NOTE S1—Nongovernment standards and other publications normally
S2.6 baseline weight estimate (BWE), n—the BWE is any
are available from the organizations that prepare or distribute the
designated weight estimate that is used as a starting point in a
documents.Thesedocumentsalsomaybeavailableinorthroughlibraries
design phase for comparative analysis with subsequent weight
or other informational services.
estimates. Before contract award, the final estimate of each
S1.3 Order of Precedence—In the event of a conflict
designphaseisusuallythebaselineestimateforthesucceeding
between the text of this guide and the references cited herein,
phase.After contract award, theAWE orABWE usually is the
the text of this guide takes precedence. Nothing in this guide,
baseline estimate for the remainder of detail design and
however, supersedes applicable laws and regulations unless a
construction.
specific exemption has been obtained.
S2.7 bidder’s independent weight estimate (BIWE), n—the
bidder’s (or offeror’s) independent weight estimate is prepared
S2. TERMINOLOGY
by
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately,ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
An American National Standard
Designation:F1808–97a (Reapproved 2002) Designation:F1808–03 (Reapproved 2008)
Standard Guide for
Weight Control Technical Requirements for Surface Ships
This standard is issued under the fixed designation F1808; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope
1.1 This guide provides recommended weight control technical requirements for surface ships and discusses different types of
weightestimates,reports,andweightcontrolprocedures.Itcontainsaweightclassificationthatwillassistinachievinguniformity
by standardizing the weight-reporting system.
1.2 This guide is applicable to ships designed and constructed in inch-pound units of measurement and to ships designed and
constructed in SI units of measurement. Whenever inch-pound units are shown or referred to in the text, or in example formats
included in this guide, it is to be understood that corresponding SI units may be substituted if applicable to a ship designed and
constructedinSIunits,providedthatwhicheversystemisused,itisconsistentlyusedinallweightcontrolreportingdocumentation
for the ship.
2. Referenced Documents
2.1 ASTM Standards:
F1321Guide for Conducting a Stability Test (Lightweight Survey and Inclining Experiment) to Determine the Light Ship
Displacement and Centers of Gravity of a Vessel
F1321 Guide for Conducting a Stability Test (Lightweight Survey and Inclining Experiment) to Determine the Light Ship
Displacement and Centers of Gravity of a Vessel
F1332 Practice for Use of SI (Metric) Units in Maritime Applications (Committee F25 Supplement to IEEE/ASTM-SI-
10) IEEE/ASTM SI 10)
3. Terminology
3.1 Definitions:
3.1.1 agreed weight and center of gravity estimate, n—an estimate of light ship weight and centers of gravity data, mutually
agreed upon between the owner and the shipbuilder shortly after award of the shipbuilding contract, based on the ship design
information, for example, specifications, drawings, and so forth, available at the time of award.
3.1.2 as-built weight and center of gravity estimate, n—adetailedfinalestimateoflightshipweightandcentersofgravitydata,
adjusted for inclining experiment results, reflecting the as-built ship including the net effect of contract modifications.
3.1.3 center of gravity, n—thepointthroughwhichtheresultantofallgravitationalforcesonashiporacomponentpasses.The
location, a balance point, at which the entire weight of a ship may be considered to be concentrated.
3.1.4 deadweight, n—the total carrying capacity of a ship including weight of cargo, fuel, lubricating oil, fresh water in tanks,
stores, passengers and baggage, and crew and their effects.
3.1.5 incliningexperiment,n—aprocedureperformedonacompleted,oralmostcompleted,shiptoestablishexperimentallythe
light ship values of the displacement and the vertical, longitudinal, and transverse positions of its center of gravity (see Guide
F1321for detailed procedures).
3.1.6 independent weight and center of gravity estimate, n—the estimate of light ship weight and centers of gravity performed
by the shipbuilder shortly after award of the shipbuilding contract based on the ship design information available at the time of
award.Whencomparedwiththeowner’sestimateanduponresolutionofdifferences,anagreeduponweightandcenterofgravity
estimate will result.
3.1.7 light ship weight, n—the weight of the ship with all its equipment and outfit, including permanent (fixed) solid or liquid
ballast, spare parts that are carried on board, water in boilers at operating levels, machinery including Marine Sanitation Device
This guide is under the jurisdiction of ASTM Committee F25 on Ships and Marine Technology and is the direct responsibility of SubcommitteeF25.07 on General
Requirements.
CurrenteditionapprovedNov.10,1997.May1,2008.PublishedNovember1998.July2008.Originallyapprovedin1998.1997.Lastpreviouseditionapprovedin19982003
as F1808–97a.F1808–03.
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.For Annual Book of ASTM Standards
, Vol 01.07.volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
F1808–03 (2008)
units in working condition, lubricating oil in all machinery, but not in storage tanks, and liquids in all piping systems.
3.1.8 longitudinal center of gravity (LCG), n—the point through which the gravitational forces on a ship pass, measured
longitudinally from amidships, measured from the forward perpendicular, or in some cases, measured from the aft perpendicular.
3.1.9 transverse center of gravity (TCG), n— the point through which the gravitational forces on a ship pass, measured
transversely, port or starboard, from the ship’s centerline.
3.1.10 vertical center of gravity (KG or VCG), n—the point through which the gravitational forces on a ship pass measured
vertically from the keel (K) or the ship’s baseline.
3.1.11 weigh; to weigh, v—as commonly understood in everyday usage and in the maritime industry, and as used throughout
this guide, means to determine by measuring the mass of.
3.1.12 weight, n—as commonly understood in everyday usage and in the maritime industry, and as used throughout this guide,
is synonymous with mass. In this guide, weight in inch-pound units is measured in pounds and in long tons of 2240 lbs; and in
SI units (metric), weight is measured in kilograms and in metric tons of 100 kg. Refer to Practice F 1332 for conversion factors
to convert inch-pound quantities to SI (metric) quantities for units of weight, moment, moments to trim, and so forth.
3.1.13 weight classification, n—the system used in light ship weight estimating for grouping materials, equipment, or
components of the ship in a structured order to facilitate comparison and to ensure completeness.
3.1.14 weight group, n—one of the three major elements of light ship weight as used in the weight classification, that is, hull
structure, outfit, and machinery.
4. Summary of Guide
4.1 Determination of Weight and Moment Data—Theweightandmomentdataforallcomponentsandmaterialandtheiroverall
effectontheship’sweight,centerofgravity,list,andtrimshouldbedetermined.Asshipdesignorshipconstructiondrawingsare
prepared and as material is selected, acquired, or received, the weight and centers of gravity of all items that comprise the ship
should be determined and reported in the weight estimates and reports. These data may be obtained by estimation or calculation
duringpreliminaryandcontractdesign,byacombinationofestimationorcalculationofshipconstructiondrawings,andbyactual
weight determination of items during detail design and construction.
4.2 Weight Reporting and Control —The procedures for weight reporting and control, regardless of the level of reporting, are
described in Section 6 and apply for commercial ships.The method and frequency of weight reporting can vary depending on the
specific ship design, as well as the technical requirements set forth in the contract.The extent and level of weight control also can
vary depending on the specific ship design.Although the weight control technical requirements for commercial ships usually are
lessdemandingthanthoseforU.S.Navysurfaceships,theneedforamechanismtocontroltheweightofashipstillexists.Section
S-10 describesSections S1–S4 describe the specific weight control technical requirements for U.S. Navy surface ships.
5. Significance and Use
5.1 It is important to know the amount of weight and its location before the ship is built to be sure that when it is built it will
havepositivestability.Onlythroughdetailedweightestimatinginthedesignstageandduringconstructioncanonebeensuredthat
positive stability will be achieved and retained.
6. Procedure
6.1 Aspecifiednumberofcalendardays,thatis,30,45,60,or90afterdateofaward,asspecifiedbytheowner,theshipbuilder
should submit for agreement an independent weight and center of gravity estimate. This estimate should describe the weight and
centers of gravity of the ship in comprehensive detail and should include summaries and work sheets showing the detailed work
performed, for example, calculations and estimates based on the design information, drawings, specification, and so forth.
Appendix X1 contains suggested forms for the independent estimate, and it includes a suggested weight classification system for
the estimate. Terms used in the weight classification are defined in the Maritime Administration Publication, Classification of
Merchant Ship Weights.
6.2 Amutualagreementbetweentheshipbuilderandtheowneronthelightshipweightandcentersofgravityshouldbereached
as quickly as possible after award of the shipbuilding contract. Agreement action should consist of a review of shipbuilder’s
independent weight and center of gravity estimates and comparison with the owner’s estimate. Upon resolution of differences, an
agreed upon weight and center of gravity estimate will result. Thereafter, the shipbuilder should be responsible for obtaining in
the completed vessel the agreed upon weight and center of gravity characteristics adjusted for authorized departures from the
contracted ship design, reflected in the agreed upon estimate.
6.3 Departures from the contracted ship design, reflected in the agreed upon estimate, which affect the light ship weight and
centers of gravity, should not be undertaken until the shipbuilder has submitted to the owner his estimate of the effect on weight
and centers of gravity of the ship and obtained written approval to proceed with the department. Departures, which have a total
impact on any weight group of less than a specified percentage, that is, 0.01, 0.02, 0.03, or 0.04% of the light ship weight, may
be considered negligible and will not require written approval with respect to weight.
U.S. Department of Transportation, MaritimeAdministration Classification of Merchant Ship Weights, January 1985.Available from the U.S. MaritimeAdministration,
Office of Ship Construction, MAR 720, 400 Seventh St., SW, Washington, DC 20590.
F1808–03 (2008)
6.4 The shipbuilder should submit periodically, as agreed upon, to the owner, a tabulation of approved departures and their
cumulativeeffectonweightandcentersofgravityoftheagreedlightshipestimate.Inaddition,whensubmittingplansthatinvolve
departuresfromthetypeofconstructioninthecontractedshipdesign,reflectedintheestimate,theshipbuildershoulditemizesuch
departures and their effect on light ship weight and centers of gravity in his periodic reports. A final report should be submitted
at the time of delivery adjusted to bring the estimated light ship weight and centers of gravity into reasonable agreement with the
inclining experiment results.
7. Keywords
7.1 light ship; ship acquisition; weight control; weight estimate; weight report
SUPPLEMENTARY REQUIREMENTS
The following supplementary requirements shall apply only when specified by the purchaser in the
contract or purchase order. These requirements normally are invoked for U.S. Navy Surface Ships.
S1. SPECIAL GOVERNMENT REQUIREMENTS
S1.1 GovernmentDocuments,Drawings,andPublications—Thefollowinggovernmentdocuments,drawings,andpublications
form a part of this guide to the extent specified herein. Unless otherwise specified, the issues are those cited in the solicitation.
S1.1.1 Naval Sea Systems Command (NAVSEA) Documents:
0900-LP-039-9020 Ship Work Breakdown Structure for Nuclear Propulsion Plant (U)
S9040-AA-IDX-010/SWBS 5D, Expanded Ship Work Breakdown Structure, Vol I
S9040-AA-IDX-020/SWBS 5D, Expanded Ship Work Breakdown Structure, Vol II
S1.2 Nongovernment Publications—The following document(s) form a part of this guide to the extent specified herein. Unless
otherwisespecified,theissuesofthedocuments,whichareDODadopted,arethoselistedintheissueoftheDepartmentofDefense
Index of Specifications and Standards (DODISS) cited in the solicitation. Unless otherwise specified, the issues of documents not
listed in the DODISS are the issues of the documents cited in the solicitation (see S4.1).
S1.2.1 ANSI Document:
X3.4 Code for Information Interchange
NOTE S1—Nongovernment standards and other publications normally are available from the organizations that prepare or distribute the documents.
These documents also may be available in or through libraries or other informational services.
S1.3 Order of Precedence—In the event of a conflict between the text of this guide and the references cited herein, the text of
this guide takes precedence. Nothing in this guide, however, supersedes applicable laws and regulations unless a specific
exemption has been obtained.
S2. TERMINOLOGY
S2.1 accepted ship report (ASR), n—theASR is the document that demonstrates the contractor’s performance with regard to
weight control.TheASR highlights the differences between the accepted weight estimate (AWE) or the allocated baseline weight
estimate (ABWE) and the delivered ship as inclined.
S2.2 accepted weight estimate (AWE), n—theAWE defines the weight and centers of gravity of a ship that was awarded under
aspecification-typecontractusingtheinformationthatwasavailableatthetimeofcontractaward.Itestablishescontractualvalues
for weight and KG and is the baseline for detail design and construction.
S2.3 acquisition margins, n—acquisition margins are weight and KG allowances included in the weight estimate to cover the
inherent limits of precision and the undefined variations of component weight and centers of gravity that take place throughout
the design phases and during the construction of a ship. To provide for adequate weight control and configuration control,
acquisition margins are divided into five accounts: preliminary design margin, contract design margin, detail design and building
margin, contract modification margin, and government-furnished material (GFM) margin.
S2.4 actual weight, n—actualweightisthevalueobtainedbyameasurementofmaterialonanaccuratescaleorotherweighing
device.
S2.5 allocated baseline weight estimate (ABWE), n—the ABWE is the contractor’s definition of the weight and centers of
gravity of a ship that was awa
...
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