ASTM_F_1808_-_03_2013.pdf

Designation:F180803(Reapproved 2013)An American National StandardStandard Guide forWeight Control Technical Requirements for Surface Ships1This standard is issued under the fixed designation F1808;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This guide provides recommended weight control tech-nical requirements for surface ships and discusses differenttypes of weight estimates,reports,and weight control proce-dures.It contains a weight classification that will assist inachieving uniformity by standardizing the weight-reportingsystem.1.2 This guide is applicable to ships designed and con-structed in inch-pound units of measurement and to shipsdesigned and constructed in SI units of measurement.When-ever inch-pound units are shown or referred to in the text,or inexample formats included in this guide,it is to be understoodthat corresponding SI units may be substituted if applicable toa ship designed and constructed in SI units,provided thatwhichever system is used,it is consistently used in all weightcontrol reporting documentation for the ship.2.Referenced Documents2.1 ASTM Standards:2F1321 Guide for Conducting a Stability Test(LightweightSurvey and Inclining Experiment)to Determine the LightShip Displacement and Centers of Gravity of a VesselF1332 Practice for Use of SI(Metric)Units in MaritimeApplications(Committee F25 Supplement to IEEE/ASTM SI 10)3.Terminology3.1 Definitions:3.1.1 agreed weight and center of gravity estimate,nanestimate of light ship weight and centers of gravity data,mutually agreed upon between the owner and the shipbuildershortly after award of the shipbuilding contract,based on theship 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,nadetailed final estimate of light ship weight and centers ofgravity data,adjusted for inclining experiment results,reflect-ing the as-built ship including the net effect of contractmodifications.3.1.3 center of gravity,nthe point through which theresultant of all gravitational forces on a ship or a componentpasses.The location,a balance point,at which the entire weightof a ship may be considered to be concentrated.3.1.4 deadweight,nthe total carrying capacity of a shipincluding weight of cargo,fuel,lubricating oil,fresh water intanks,stores,passengers and baggage,and crew and theireffects.3.1.5 inclining experiment,na procedure performed on acompleted,or almost completed,ship to establish experimen-tally the light ship values of the displacement and the vertical,longitudinal,and transverse positions of its center of gravity(see Guide F1321 for detailed procedures).3.1.6 independent weight and center of gravity estimate,nthe estimate of light ship weight and centers of gravityperformed by the shipbuilder shortly after award of theshipbuilding contract based on the ship design informationavailable at the time of award.When compared with theowners estimate and upon resolution of differences,an agreedupon weight and center of gravity estimate will result.3.1.7 light ship weight,nthe weight of the ship with all itsequipment and outfit,including permanent(fixed)solid orliquid ballast,spare parts that are carried on board,water inboilers at operating levels,machinery including Marine Sani-tation Device units in working condition,lubricating oil in allmachinery,but not in storage tanks,and liquids in all pipingsystems.3.1.8 longitudinal center of gravity(LCG),nthe pointthrough which the gravitational forces on a ship pass,measuredlongitudinally from amidships,measured from the forwardperpendicular,or in some cases,measured from the aft perpen-dicular.1This guide is under the jurisdiction of ASTM Committee F25 on Ships andMarine Technology and is the direct responsibility of Subcommittee F25.07 onGeneral Requirements.Current edition approved Oct.1,2013.Published October 2013.Originallyapproved in 1997.Last previous edition approved in 2008 as F1808 03(2008).DOI:10.1520/F1808-03R13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.9 transverse center of gravity(TCG),n the pointthrough which the gravitational forces on a ship pass,measuredtransversely,port or starboard,from the ships centerline.3.1.10 vertical center of gravity(KG or VCG),nthe pointthrough which the gravitational forces on a ship pass measuredvertically from the keel