4A Chemical Tanker Simulator Training Course

Tanker Officer Training Standards (TOTS)

4A Chemical Tanker Simulator Training Course


CONTENTS

Prerequisites..............................................................................................................................................................................1TOTS Reference....................................................................................................................................................................1STCW 95 Reference............................................................................................................................................................1Physical Realism....................................................................................................................................................................2Behavioural Realism..........................................................................................................................................................2Operating Environment...................................................................................................................................................2Simulator Facility...................................................................................................................................................................2

SimulatorExercisesExercise 1. Simulatorandshipfamiliarisation...........................................................................................4Exercise 2. Cargoplanning–paperexercise............................................................................................5Exercise 3. Tankpreparation,washingandinerting..............................................................................6Exercise 4. Commenceloadingatthefirstloadport...........................................................................7Exercise 5. Midloading,monitoringcommencemoreloading,ballast..................................9Exercise 6. Completeloadingfirstport...........................................................................................................10Exercise 7. Loadedvoyage,monitoring,agitation...................................................................................11Exercise 8. Firstdischarge,secondloadport.............................................................................................12Exercise 9. Midsecondport–loading,discharge&pre-wash...................................................13Exercise 10. Completionofdischargeincludingstripping..................................................................14Exercise 11. Wash,ventilation,&cooling..........................................................................................................15Exercise 12. DischargeresiduesatseaaccordingtoMARPOL...................................................16

Appendix I CargoStowagePlan–Afterfirstloadport....................................................................17Appendix II CargoStowagePlan–Aftersecondload/firstdischarge.................................18


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INTERTANKO (TOTS) — 4A Chemical Tanker Simulator Training Course 1



Prerequisites Itisintendedthatbythetimecandidatesaregiventhistankersimulatortraining,theywillhaveexperiencedseatimeonsimilartankersandhavetakenpartinthesimilarexercisestothosesimulatedhere.Thisencounterwithsimulatedexercisesshouldnotbetheirfirstexperienceofsuchoperations.

Itisintendedthatthesimulatorusedforthistrainingwillenabledemonstrationofthefollowingcompetencies:

TOTS Reference CompetenceTOTS4A Traininginchemicaltankeroperations

STCW 95 Reference CompetenceTableA-II/1.9 Monitortheloading,stowage,securing,careduringthevoyageand

unloadingofcargoes.

TableA-II/3.6 Maintainseaworthinessoftheship.TableA-II/3.8TableA-III/1.11

TableA-II/2.11 Planandensuresafeloading,stowage,securing,careduringvoyageandunloadingofcargoes.

TableA-II/12.2 Carriageofdangerouscargoes.TableA-II/2.13 Controltrim,stabilityandstressTableA-III/12.12

TableA-II/2.14 MonitorandcontrolcompliancewithlegislativeTableA-III/2.13 requirementsandmeasurestoensuresafetyoflifeatseaand

protectionofthemarineenvironment.SectionA-V/1.19 Shipoperations(chemicaltanker)SectionA-V/1.21 Emergencyoperations(chemicaltanker)

Forinstructor,supervisorandassessorqualificationsseeSTCW95RegulationI/6,SectionA-I/6paragraph3andA-I/12paragraphs6to9.

INTERTANKO (TOTS) — 4A Chemical Tanker Simulator Training Course2

Physical Realism IMO Model Course 1.04 Part D Appendix 9Thesimulatorusedshouldfulfilthefollowingminimumrequirements:

• Itwillsimulateatypicalcargohandlingsystemfoundonachemicaltankerbasedonrealoperationalvessels.

• Theequipmentisarrangedinashiplikemanner.

Thesimulatorincludesthefollowingcomponentsandsubsystems:

• Cargocontrolsystem• Ballastcontrolsystem• Tankcleaningsystem• Overboarddischargeandmonitoringsystems• Tankcontentmonitoringsystems• Inert/ventingcontrolsystemincludingsparging,gasfreeing,purgingandaerating.• Tankatmospherecontrolsystem• Alarmsystem• Communicationsystem• Cargopumpingsystem• Asystemforcommunicatingwith‘theoutsideworld’• Astabilityandstresscalculator.

Additionalresources: Ship/shorechecklist Tankwashingchecklist NLSCargorecordbookextracts Logsheets

Behavioural Realism IMO Model Course 1.04 Part D Appendix 9Thesimulatormodelreplicatesthedynamicbehaviourofthecargohandlingsystemanditsparameters.Furthermore,thesimulatormodelsimulatesthecomponents,theirprocessesandcontrolsystems.Itwillbepossibletointroducefailures,breakdownsandweartoallequipmentsimulated.

Operating Environment IMO Model Course 1.04 Part D Appendix 9Thesimulatorwillsimulaterestrictionsandfailuresinthecargotransfer,forinstance,introducedbythesimulatedshoreterminal.Alarmswillbeannouncedbyflashingalarmlampsandsoundinthe‘cargocontrolroom’.

Simulator FacilityTheseexerciseshavebeenwrittentakingintoaccountthevarietyofsimulatorswhichmaybeusedtofacilitatethem.Asfewspecificfeaturesaspossiblehavebeenfeatured,soastoincreasetheadaptabilityoftheexercisestothevarioussimulatorsavailable.

Thetankerinthispackageisdoublehulled,has10pairsofwingtanks,2to8ofwhicharesub-dividedintocentreandwingspaces.Eachtankhasitsownpump,ventlineandmanifold.Thereare2ballastpumps.Theballasttankarrangementhasnotbeenspecified.

However,thesimulatorshouldhaveitsownCargoOperationsManualwhichwillbeusedduringthetraining.


Simulator ExercisesExercise 1. Simulatorandshipfamiliarisation

Exercise 2. Cargoplanning–paperexercise

Exercise 3. Tankpreparation,washingandinerting

Exercise 4. Commenceloadingatthefirstloadport

Exercise 5. Midloading,monitoringcommencemoreloading,ballast

Exercise 6. Completeloadingfirstport

Exercise 7. Loadedvoyage,monitoring,agitation

Exercise 8. Firstdischarge,secondloadport

Exercise 9. Midsecondport–loading,discharge&pre-wash

Exercise 10. Completionofdischargeincludingstripping

Exercise 11. Wash,ventilation,&cooling

Exercise 12. DischargeresiduesatseaaccordingtoMARPOL

Appendix I CargoStowagePlan–Afterfirstloadport

Appendix IICargoStowagePlan–Aftersecondload/firstdischarg

Exercise DescriptionsWhatfollowsbywayofexercisedescriptionshasbeenwrittenintheformofstudents’objectives.Inordertopreventmultipleduplication,thenotesmayalsoformguidanceforinstructors.


EXERCISE 1 Ship and simulator familiarisation

ObjectiveThepurposeofthisexerciseistohelpyoubecomefamiliarwiththeoperationofthesimulatorandthecargosystem.Itissuggestedthatduringthisfirstexercise,aballastpumpisstartedinorderforaballastspacetobetoppedoff.Thiswillgiveyouanopportunitytopracticepump,lineandvalvecontrol.ItisalsosuggestedthattheInertGassystemisstartedandthecargosystempressurised,inorderforyoutofamiliariseyourselfwiththeinertingprocess.

InformationThevesselhasjustdepartedfromdrydock,sothecargosystemisgasfreeandwillneedinerting.Allbunkers,freshwaterandballastareasperthenormalballastcondition,otherthentheforepeakballasttank,whichneedstoppingup.

Note:Itisappreciatedthatnotallliquidcargosimulatorswillhaveexactlythesamefunctionsincorporated.Thefollowingaresuggestionsofsystemswithwhichyouneedtobefamiliar:

1. CheckthevariouspagesofthevesseldisplayandespeciallythelocationandactivationoftheEMERGENCYSTOPfunction.

2. LocatetheindividualCARGOandBALLASTtankstatuspages,notforgettingeachelementoftheballastsystemincludingforeandaftpeaktanks,ifwithintheballastsystem.

3. FamiliariseyourselfwiththeDRAFTINFORMATION,whichwillbeimportantforarrivalstatusandwhenstrippingcargoandballasttanks,aswellasanydraftrestrictions.

4. Establishhowtoco-ordinatePOWERREQUIREMENTSfordeckandcargogear.Theserequirementswillalterdependingontheoperation,soyouneedtobefamiliarwiththeirsourceandtheplanningofrequirements.

5. BefamiliarwithGENERALOPERATINGPARAMETERSintermsofmaximumandminimumlevels.Onthesimulatorinusecanambientweatherconditionsbealtered?

6. ThepagesofthesimulatorscreendetailingtheCARGOTANKselectionandpreparation,valve,levelandalarmfunctionswillneedcloseattention.

7. BearinginmindthenumberofconfinedspacesontankerstheGASDETECTIONpanelswillbeofparticularconcern.

8. ItiscrucialthatBALLASTCONTROL,valves,levelandalarmfunctionsaremonitoredfrequentlyduringtheseoperations.

9. SomecargoesrequireaccurateCARGOTEMPERATURECONTROLfunctions,water,steamorthermaloil.

10. AnumberofexercisesrequiretheuseofTANKWASHINGfunctions,supplyingeitherseaorfreshwater.

11. AlmostallexercisesinvolveINERTGAS,NITROGENANDVENTINGARRANGEMENTS.CertainexerciseswillalsoincludeVAPOURRECOVERY,soaclosefamiliaritywiththesefunctionswillbenecessary.

12. SometankpreparationrequirementswillinvolveMECHANICALVENTILATIONsothefunctionofthefanssupplyingthisisimportanttomaster.

13. PUMPCONTROLSofeachtypeofpumpshouldbemasteredearlyintheprogramme,whichispartlywhyoperationoftheballastpumpisincludedinthisfamiliarityexercise.

14. ThefunctionsoftheMANIFOLDCONTROLSrequirefamiliarity.

15. DonotforgetthetankDRAININGANDSTRIPPINGarrangementsforcargoandballastsystems,astheywillbeutilisedduringthetraining.

16. Donotforgeteithertomonitorthestatusoftheballasttankbeingworkedduringthisfamiliarisationexercise.


EXERCISE 2 Cargo planning – Paper exercise

ObjectiveToplanthestowageofaseriesofparcels,withreferencetotheUSCGcargocompatibilitychart,takingintoaccountthesegregationofincompatiblecargoes.Acargoplanisappendedtothispackagesothecargoesincludedthereinmaybeusedforthisexercise,ifthetrainingestablishmentsodesires.

InformationItisimportanttodiscussthefollowinginaccordancewiththeobjectivesofthisexercise:

• Cargoquantitiesandtankcapacities• Physicalandreactivepropertiesofeachcargo• Compatibilityofeachcargoparcel• Tanksegregation• Temperaturecontrolrequirements• Vapourreturnrequirements• Cargodistributionwithrespecttohullstresses• Methodofproducingplan • Datagatheringforeachparcel • Compatibilityofeachparcel • Finalstowageplan

Competence RequirementsUnderstandtheprinciplesofcargoplanning,incorporatingcompatibilitychemicalmanualissues(includingexceptions)anddataguidesegregation,

Understandtheinfluencethephysicalpropertiesofcargoparcelswillhaveonthestowageplan

Understandtheneedfortankpreparationwithspecificreferencetotankatmospherecontrol,includingsafetyandcommercialissues.

Thegeneralscenarioisthatthevesselisinthenormalballastconditionwithfreshairinallthecargotanks.Therearenoresiduesonboard.

Note:Sincethefeasiblepermutationsofappropriateplansishuge,aslongasallrequirementsofcompatibilityandphysicalissuesaremet,apre-arrangedplanwillbeutilisedfortheremainderofthistrainingprogramme.


EXERCISE 3 Tank preparation washing and inerting

ObjectiveThisexerciseisfocussedontheobjectiveofpreparingthevesseltostarttrading.Cargoordershavealreadybeenreceivedandtheseincludehighspecificationcargoeswhichwillrequirewellpreparedtanks.Thisexercisewillinvolvethefinalstageofthepreparativeprocessinvolvingahotfreshwaterwashoftanks6CP&S,7CP&S,1P&S,2P&S.Inaddition,tanks5CP&Sneedtobeinertedwithnitrogen.

Information 1. Setupthetankwashingsystemandfreshwaterheatingarrangements,inordertowashthepairsof

tanksdetailedaboveintheobjective,6CP&S,7CP&S,1P&S,2P&S.

2. Intheinterestsofbestpractice,pressuretestthewashingsystempriortouse,atatestpressuremarginallyabovetheworkingpressure.Thistestmaybecarriedoutwithcoldratherthanhotwater.Youmustdecidewhetherfreshorseawaterwillbeanappropriatemediumforthistest,notingthepreparationrequirementsofthenextcargointhosetanks.

3. 5CP&Swillneedinertingwithnitrogen.Again,youmustdecidewhichmethodofinertingismostappropriateforthecircumstances:dilutionordisplacement.

4. Allfixedandportablegaddetectionandanalysingequipmenthasbeenchecked,calibratedandisreadyforuse.

Competence Requirements1. Intheinterestsofbestpractice,ensuretherelevantchannelsofcommunicationareworkingsmoothly.

2. Youhavealreadyfamiliarisedyourselfwiththenitrogenplant,duringExercise1,soitisnowtimetousethatknowledgeforthepurposeofinertingthesaidtanks.

3. BearinmindthepressuresettingsinthetankP/Vvalves,considercarefullytheinletvelocityofthenitrogenintothetanksandpaycloseattentiontothedeliveryandmainpressures.

4. Considercarefullytheambienttemperatures,includingairandseatemperatures.Rememberthatvastdifferencesinsuchtemperaturesinsideandoutsideofthetankscouldresultincondensation.Theresultantpotentialcargocontaminationissuescouldbecommerciallydamaging.Ensurethedewpointofthenitrogendestinedfor5CP&Sisoflowdewpoint,toensureadrytankatmosphere.

Ensureyoubecomewellpracticedwithdrainingandstrippingproceduresduringthiswashingoperation,inthelightofthecargooperationstofollowinduecourse.


EXERCISE 4 Commence loading

ObjectivePlanandexecutealoadingoperation,withdueaccordancewithsafetyandpollutionpreventativemeasures.Ensurepre-cargochecksandtestsarecarriedout,includingalarms.

Information1. Thevesselissecurelymooredportsidealongside.

2. Cargotankswillhavebeencleanedandpreparedreadyforloading.Thevesselisballastedtothenormalarrivalballastcondition.

3. Youwillhavehadtoprepareacargoloadingandde-ballastingplananditwillbeimportanttofollowtheplantoenablethetwooperationstobeconductedsimultaneously.

4. Thevessel’sdraft,trim,listandstressesarenottoexceednormaloperationalparameters.

Thetankstobeloadedatthefirstloadportareasfollows:

1P&Sand2P&S PotassiumHydroxideSolution40%

3CP&Sand4P&S Benzene

6CP&Sand7CP&S Acetonitrile

8CP7Sand9CP&S Aceticacid

10P&S CTC

5. Ofthesegrades,Potassiumhydroxidesolution40%,Acetonitrile,andCTCwillbestartedinthisexerciseinanyorderofyourchoosing.BenzeneandAceticAcidwillbestartedinthenextexerciseastheBenzenerequiresavapourreturnline.

6. Whenplanningthisloadingoperationtakeintoaccountthemaximumloadingratesofeachtank,inrelationtoitsventingcapability.

Competence Requirements1. Monitorthewayinwhichtheloadingofeachgradeiscommencedwithrespecttocommunications,

loadingratesandnumberoftanks.

2. Monitorthesamplingprocedures.

3. Onceloadinghasstartedintherequisitecargotanks,monitorthewayinwhichde-ballastingoperationsaremanaged.

4. Demonstratefrequentmonitoringofallcargoandballasttanks,toensurethatemptytanksarenotleakedinto.Atthisfirstloadport,eachparcelisbeingloadedintofourcargotanks,withtheexceptionoftheCTC,whichisgoingintotwotanks.

5. Demonstratehowthedischargepressuresoftheballastpumpsshouldbemonitored.Thecargomanifoldbackpressureshouldbeconstantlymonitoredandrecordedinthecargolog.

6. Generalcommunicationswithdeckcrewandterminalshouldbemaintainedefficiently.

7. Whilstalongside,mooringandsecuritywatchesneedtobemaintained.

8. Youshouldagreewiththeterminalthesamplingprocedurestobefollowedforeachgrade.

9. Statewhichtankalarmsrequiretestingbeforeloadingcommences.

10. Statewhichchecksarerequiredontheventingsystems.

11. Statewhichprovisionsaremadeforgastesting.


Loading Plan

Load Port 1

Cargo to LoadPotassiumHydroxide40% Tanks 1P,1S,2P,2S

Benzene Tanks 3CP,3CS,4CP,4CS

Acetonitrile Tanks 6CP,6CS,7CP,7CS

AceticAcid Tanks 8CP,8CS,9CP,9CS

CTC Tanks 10P,10S

NotethatloadingwillcommencewithPotassiumHydroxide40%,acetonitrileandCTC.Attheterminal’srequest,theloadingofBenzeneandAceticAcidwillcommenceabouttwohoursafterthestartoftheothergrades.

DeballastingDrawupaballastingplanwhichwilltakeintoaccountthesailingconditionofthevessel.Rememberthattrimandlistmaybeadjustedtofacilitatethedrainingandstrippingofcargotanks.

Calculate,withtheaidofthesimulatorfacility,thevessel’sdraft

Port 2 - Load / Discharge

Cargo to LoadToluene 1840m3 Tanks 3P,3S,4P,4S,5P,5S

PropyleneOxide 840m3 Tanks 5CP,5CS

Acetone 2250m3 Tanks 6P,7P,8P,9P

Methanol 2200m3 Tanks 6S,7S,8S,9S

Cargo to DischargePotassiumHydroxide AllTanks

Benzene AllTanks

AceticAcid AllTanks

CTC AllTanks

Tanks to be pre-washedCTCtanks,10P&S


EXERCISE 5 Mid loading, monitoring, commence more loading, de-ballast

ObjectiveDuringthisexercisemultipleoperationswillbeoccurringsimultaneouslysoyouwillhaveanopportunitytoexperiencetheneedtomonitorandmanageeachofthem.Thenatureofthechemicalparceltankerissuchthatitisvitaltobefamiliarwiththistypeof‘multi-tasking’.Itisalsoimportanttobeabletoutilisetheresourcesatyourdisposalandensurethatsmoothchannelsofcommunicationsarekeptrunning.

Information1. Thevesselhasalreadystartedtoloadthefollowingcargo;

1P&Sand2P&S PotassiumHydroxideSolution40%

6CP&Sand7CP&S Acetonitrile

10P&S CTC

2. Thisexercisewillinvolvetheloadingofthefollowing;

3CP&Sand4P&S Benzene–thisparcelwillrequirethevapourrecovery arrangement.

8CP7Sand9CP&S Aceticacid

3. De-ballastingplansshouldhavebeenmadeinordertocounteractthestabilityimplicationsandstressesimposedbythemovementoftheseparcels.

Competence Requirements1. Ensureyouarecomfortablewiththeloadingoftheinitialgroupofparcels.Befamiliarwithroutineand

frequentchecksofullagesandoftheballastpumps.

2. Statewhichchecksshouldyoumakepriortostartingtoloadthesetwoparcels.

3. Statewhicharethestaticelectricityimplicationsatthestartofloadingatank.Atwhatpointmaythemaximumbulkloadingrateberequested.

4. Statewhatactionshouldbetakentoavoidmultipletanksattainingtheirtoppingoffullageatthesametime.

5. Statewhatareyouroptionsshouldyoubeunabletocopewithsomanysimultaneousoperations.

6. StatehowtheloadingrateoftheBenzeneparcelmaybeaffectedbytheuseofthevapourreturnmanifold.


EXERCISE 6 Complete first loading port

ObjectivesThisexerciseisdesignedtofamiliariseyouwiththemanagementofmultipleoperationsconcurrentlywithtoppingoffcargotanksandclearingoflines.

InformationTheparcelsofCTC,acetonitrileandpotassiumhydroxideareclosetotoppingoffandtheirloadingwillbecompletedduringthisexercise.ThoseofAceticAcidandBenzenehavenotlongstarted.

Alltankscontinuetoneedmonitoring,nomatterwhattheirstatus.However,theoriginalplanningofstaggeringtheparcelsapproachingtheirfinishcancometofruitionduringthisexercise.

Linesaretobeclearedoncompletionofloadingeachgrade.

Thefollowingtankswillbetoppedoffduringthisexercise:

1P&Sand2P&S PotassiumHydroxideSolution40% 6CP&Sand7CP&S Acetonitrile 10P&S CTC

Loadingwillcontinueinto;

3CP&Sand4P&S Benzene 8CP7Sand9CP&S Aceticacid

De-ballastingwillalsocontinue.

Competence Requirements1. Alltankscontinuetoneedmonitoring,nomatterwhattheirstatus.However,theoriginalplanningof

staggeringtheparcelsapproachingtheirfinishcancometofruitionduringthisexercise.

2. Linesaretobeclearedoncompletionofloadingeachgrade.

3. Statewhichtankswillreachfinishingullagefirst.

4. Statehowastaggeredtoppingoffsequencecanbeestablished.

5. Statewhattherespectiveadvantagesanddisadvantagesbetweena‘shipstop’anda‘shorestop’are.

6. Statewhatistheprincipleconcernonthetankeriswhentheterminalrequesttheclearingattheircargolines.

7. Discussthecontrolofloadingratesastanksapproachtheirtoppingoff.

8. Statewhycommunicationwiththeterminalissoimportantduringthisstageofthecargooperation.

9. Statewhatthepossibleconsequencesareofclosingatankvalveagainsttheflowofcargobeingloadedfromashore.

10. Discussthestrategyadoptedbythestudentsduringthetoppingoffofthevarioustanks.Werecommunicationstestedandwasareductioninloadingraterequestedbeforeeachtankreacheditsfillinglevel.


EXERCISE 7 Loaded voyage, monitoring, agitation

ObjectivesAswellasgeneralmonitoringandcargocare,theBenzeneparcelwillrequireagitationorre-circulation,bearinginminditsviscosityandfreezingpointtemperature.Forthefirsttime,acargopumpwillbestarted.

Information1. Thetankerisatsea,partiallyloaded.TheBenzenecargorequiresre-circulatingand,priortoarrivalat

thenextport,thetankspreparedtoreceivepropyleneoxideneedtheiratmosphereschecking.

2. Theshipwillbeatseaonaloadedpassagewiththepowerononlyforcargomonitoringsystems.Powerforoperatingcargopumpsandvalveswillneedtoberequestedandestablished.

3. Donotforgettomonitorallothercargoandballastspacesforanomalies.

Competence Requirements1. Statewhatcommercialorlogisticconcernsmayarisebyhavingtoexecutethistaskonaloadedsea

passage.

2. Statewhoismorelikelytoissueinstructionsregardingagitation.

3. Statewhyitisnecessarytopurgethecofferdamofthesubmergedpumpsbeforeandaftertheiruse.

4. StatewhatactionsshouldbetakenintheeventofaleakofBenzeneontothedeckduringthere-circulationofcargo.

5. StatewhyPropyleneOxideneedtobetransportedinaspecifiedatmosphere.

Note: Thenitrogenatmospheresinthetanksduetoreceivepropyleneoxide,5CP&S,canbecheckedforpressureandoxygencontent.Thisisbestdoneoncethere-circulationoftheBenzeneparcelhasbeenstarted.


EXERCISE 8 First discharge, Second load port

ObjectivesAsavariationtopreviousmulti-taskingexercises,operationstomanageinthisoneincludedischarging,loadingandde-ballasting.Donotforgettheimportanceofcheck-listsandthefollowingofcargo/ballastplans.

InformationTerminalrequirementsnecessitatethatdischargingiscommencedpriortotheloadingofanygrades.ThePropyleneOxidegradeistobeloadedlast.

Thedischargeofthefollowingparcelsisplanned;

CTC from 10P&S PotassiumHydroxide40% from 1&2P&S Benzene from 3CP&S,4CP&S AceticAcid from 8CP&S,9CP&S

Loadingofthefollowingcargoesisplanned;

Toluene into 3P&S,4P&S,5P&S Acetone into 6P,7P,8Pand9P Methanol into 6S,7S,8Sand9S PropyleneOxide into 5CPand5CS

Thetanksloadingtolueneandpropyleneoxidewillrequireavapourreturnline.Ballastingwillneedtobeplannedinlinewithloading/discharge.

Asbefore,donotforgetthemaximumloadingratesapplicabletoeachcargotank.

Competence Requirements1. Statewhereinformationandadviceregardingtankpreparationislikelytocomefrom.

2. Statewheretheminimumsafetycriteriaforthecarriageofthiscargoarelisted.

3. Statethespecificcarryingconditionsgenerallyrequiredforthesecargoes.

4. Statetheformsofcontaminationthatthetankinspectionswillbeinvestigating.

5. Statewhatproceduresshouldbeadoptedatthestartofdischargetominimisethepossibilityofpressuresurgesinthelines.

6. Statewhyitisimportanttoincorporateflexibilityintothecargoplan.

7. Statewhytheacetonetanksmightnotbeloadedto98%full.

8. Statethesystemsusedforgaugingofcargotanks.

9. Statewhatfactorsaretakenintoaccountwhencalculatingcargoquantities.

10. DiscusstheconstructionandoperationofFramopumps.

11. DescribeanddemonstratethecorrectwaytostartaFramopump.

12. Discussthechecksandproceduresthatshouldbeusedwhenstartingtodischargefromanytank.

13. Discussthepossibilityofflowofliquidbackintoatankconnectedtothesameline.


EXERCISE 9 Mid Second port – loading, discharge & pre-wash

ObjectivesThisexerciseisfocussedontherequirementtoperformapre-washofthetanksfromwhichCTChasjustbeendischarged.

Information1. Thestatusofthecargotanksbeingworkedwillbesuchthatastaggerwillhavebeenestablishedin

orderthatresourcesmaybetemporarilyconcentratedonthestartingofthewashingprogramme.Thisactivityshouldinnowayunderminethemonitoringofotheroperations.Youshouldalsounderstandthatthepre-washneedswitnessingandrecordingbyaMARPOLcargoinspector.

2. Oneoftheaimsoftheexerciseistorealisethebenefitofsoundforwardplanningandefficientresourcemanagement.Anumberofactivitieswillbeon-goingsimultaneously,andthemanagementofsuchformstheessenceofchemicaltankeroperations.Whilstmonitoringalladditionalactivities,10PandSrequireapre-washimmediatelyuponcompletionoftheirdischarge.Thedurationandnumberofcyclesofthispre-washwillbedeterminedbyconsultationwiththetanker’sP&Amanual.Itissuggestedthatthetankwashingmachinesarerunfor40minutesineachtank,concurrently,inorderforthewashingtobeefficient.

3. Ensurethattheabovestepshavebeentakenpriortothesettingupandpre-washingofthenecessarytanks.Communicationswiththedeckwatchshouldremaineffective.Alsoitisgoodpracticetoadvisetheterminalofthecommencementoftankwashing.Ensurethatthelines,valvesandpumpsaresetupaccordinglyandthatthepumpsarestartedandpressurebroughtonthelines,followinggoodpractice.

Cargoisbeingloadedasfollows:

Toluene into 3P&S,4P&S,5P&S Acetone into 6P,7P,8Pand9P Methanol into 6S,7S,8Sand9S PropyleneOxide into 5CPand5CS

Dischargewillcontinue;

PotassiumHydroxide40% from 1P&S,2P&S Benzene from 3CP&S,4CP&S AceticAcid from 8CP&S,9CP&S

ThetanksfromwhichCTChasjustbeendischargedwillrequireapre-wash,soyouwillhavetosetupthetankwashingline,startthetankwashingpumpandstartthewash.

Competence Requirements1. Statewhatpre-planningisrequiredtoenablethepre-washtobestartedwithoutjeopardisingother

concurrentoperations.

2. Statehowapparenttrimdifficulties,presentedwiththeneedtocompletedischargeofCTCfromtheaftcargotanks,canfirstbeovercome.

3. Statewhichshorebasedofficialwillneedtowitnessthepre-wash.

4. Statewhattheoptionsareifsuchanofficialisnotavailable.

5. Statewheretheverificationofthepre-washwillberecordedandhowitwillbeverified.

6. Discussthemanagementofpressurewithinthetankwashingsystem.

7. Discussthevariouspre-washproceduresandrequireddocumentation.

8. Statehowyouwillknowifthetankwashingmachinesarefunctioning.

9. Statetheproceduresyouwillfollowoncethepre-washhasbeencompleted.


EXERCISE 10 Completion of discharge including stripping

ObjectivesManagethedrainingandstrippingofthetankstobedischarged.Thiswillinvolvegoodpumphandlingandoperationofthestrippingsystem.Atthesametimeyouarerequiredtomanagetheongoingloadingoperationandcontrolthetrimandlistfordrainingandstrippingoftanks.Acargoplanforthisoperationmustbepreparedbeforestartingthisoperation.

Information1. Thetaskinthisexercisewillbetostripthefollowingtanksashore;

PotassiumHydroxide40% from 1P&S,2P&S Benzene from 3CP&S,4CP&S AceticAcid from 8CP&S,9CP&S

2. Thetanksthathavedischargedtheabovecargoesneedtobestrippedtothemaximumextentpossible.

3. Loadingcontinuesinthefollowingtanksandwillneedtobemonitoredatthesametime.

Toluene into 3P&S,4P&S,5P&S Acetone into 6P,7P,8Pand9P Methanol into 6S,7S,8Sand9S

Competence Requirements1. Statewhyisitsonecessarytostripthetanksdry.

2. Statewhichsourcesofinformationcanbeconsultedforinformationregardingstrippinglimits.

3. Statewhatpracticalimplicationsareassociatedwithpoordrainingofthecargosystem.

4. Statewhatcommercialimplicationsareassociatedwithpoordrainingofthecargosystem.

5. Stateifanyofthesethreeparcelsrequireapre-wash.

6. Statewheresuchinformationcanbefound.

7. Statehowshouldthecargopumpsshouldbecontrolledduringthedrainingofthetanks.

8. Statewhatwouldhappenifthepumpcontrollerinthecargocontrolroomweretofailduringthisoperation.


EXERCISE 11 Wash, ventilation and cooling

ObjectiveTheobjectiveofthisexerciseistoventilatetanks3CP&S,4CP&S,whichpreviouslycontainedBenzene,andtocoolthecargoofPropyleneOxide(P.O.).

Information1. Thevesselisatseaafterleavingthesecondloading/dischargeport.Emptytanksaretobecleaned

readyforthenextcargo.ThiswillinvolvethewashingoftheAceticAcidtanks.Thetankwashingswillbetransferredto10P&Swhichwillbenominatedassloptanks.(Inthenextexercisethesewillbedecantedoverboard.)

2. Thecargoordersforthenextloadinghavebeenreceivedanditcanbetakenthatthestandardofwashingrequiredis‘waterwhite’.Thenextcargoeswillbelowspecificationandnon-aggressive.

3. TheBenzenetanksarealsotobecleaned.Beingavolatilecargo,thiscanbecleanedbyventilationalone.

4. TheP.O.cargotemperaturehasbeenallowedtorisetoabout17°Candthisisneartotheupperacceptabletemperaturelimit.Thecoolingsystemistoberuntopreventanyfurtherriseintemperatureandtocoolthecargobyafewdegreesoverthenext48hours.

Competence Requirements1. Statewhichtanksarerequiredtobewashed.

2. Statewhatsortofwashingmediumshouldbeused.

3. Statewhatsortofwashingcycleshouldbeutilised.

4. Statewhatshouldbedonewiththetankwashings(vesselisonly7milesfromthenearestland).

5. Statewhichtankscanbeusedassloptanks.

6. StatehowtheBenzenetanksmaybecleaned.

7. Statewhatoptionsaretherearefortheventilationofthesetanks(topbottom,bloworextract).

8. StatewhattheidealcarriagetemperatureisfortheP.O.

9. TheP.O.cargoisalittleabovetheidealtemperature.Statewhatoptionsarelikelytobeavailableforcoolingonthisship,andonotherships.

10. Statewhetherthefreshwatercoolerorthethermaloilcoolershouldbeused.

11. Statewhatchecksshouldbemadewhencoolingthecargointhisway.

12. StatewhichchecksshouldbemadeontheatmosphereintheP.O.tanks.

13. StatehowtheatmosphereintheP.O.tanksbemaintained.

14. Statehowthesemultipleoperationsshouldbecontrolled.

15. Statewhichrecordsshouldbekeptduringtheseoperations.


EXERCISE 12 Discharge residues at sea according to MARPOL

ObjectivePrepareandexecuteaslopdisposalplanfollowingthecorrectproceduresinordertodischargeresidues,asperMARPOLandtheP&Amanual.Distinguishbetweenthoseslopswhichmayandthosewhichmaynotbedischargedatsea.

Information1. Thevesselisatsea,outsideofaspecialarea,underwayataspeedinexcessof16knotsandinwaterof

about75metresdepth.Thenearestlandisabout17.5milesaway.

2. Slopsarecontainedin10P&ScargotanksandaretheresiduesofthetankwashingpreviouslycarriedoutinthecargotanksthatcontainedAceticAcid.

Competence Requirements1. Prepareaplanforthedischargeoftheslopswhichshouldincludeplanningfornecessarypower

requirementsinordertooperatevalvesandpumpsinthecargoarea.

2. EnsurearecordofeventsismaintainedandtheNLSCargoRecordBookiscompletedasrequired.

3. Ensuretheproceduressetoutintheship’sP&AManualareadheredto.

4. Ensurethatgoodpumpingpracticeisusedwhenstartingtheoperation.

5. MaintainanaccurateanddetailedlogofeventsandcompletetheNLSCargoRecordBookasrequired.

6. Statewhichchecksshouldbemadeonthestatusoftheothercargotanksduringthisoperation.RememberparticularlythesensitivityoftheP.O.cargo.


APPENDIX I

CARGO STOWAGE PLANAFTER FIRST LOAD PORT

CarbonTetrachlorideCTC

AceticAcid

Acetonitrile

Benzene

PotassiumHydroxide40%


APPENDIX II

CARGO STOWAGE PLAN AFTER SECOND LOAD / FIRST DISCHARGE

Acetone

Acetonitrile

PropyleneOxide

Methanol

Toluene

10 9 8 7 6 5 4 3 2 1

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4A Chemical Tanker Simulator Training Course

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