Harbour trials, sea trials, redelivery

    Commissioning software that carries a vessel from first energisation to a signed delivery certificate.

    Harbour acceptance trials and sea trials are where every commissioning gap on a newbuild or major retrofit finally has to answer to physics. Deskely carries the equipment register straight from installation through HAT, SAT and sea trials to delivery or redelivery, so the trials programme is run against known readiness rather than hope.

    Sequence
    HAT, sea trials, delivery
    Parties
    Yard, owner, class, flag
    Output
    Trial results and protocol
    Gate
    Delivery / redelivery certificate
    HULL 410 — SEA TRIAL PROGRAMTRIAL AGENDA AND PROTOCOL · REV DTRIAL COURSE — MEASURED MILEST-RUN-03SPEED RUNDP CAPABILITYENDURANCE RUNSEA TRIALS AND DELIVERY — RUN LOG RECORDED PER LEGTAG REGISTERST-410-SPDSpeed trial — measured mi…Records signedST-410-CBCrash-stop manoeuvreIn testST-410-FFTFire pump and hydrant testPreservationST-410-ME-LDMain engine load testPunch open6 runsunder one system hierarchy

    The problem

    Trials expose whatever the commissioning record set left unproven.

    By the time a vessel goes to sea, hundreds of systems across dozens of contractors have to be genuinely complete, not just marked complete in a spreadsheet the owner has never seen.

    When trial failures trace back to equipment that was never actually commissioned to the required standard, the dispute over responsibility often costs more time than the fix itself.

    Deskely carries the full commissioning history into the trials phase, so every system on the trial agenda is backed by the installation and functional test records that should have proven it already.

    TRIAL RUN, THEN A DISPUTE AT THE QUAYDelivery weekHarbour trials pass, sea trials pass, and then redelivery stalls over what was actually carriedHarbour acceptance trialSigned — 2 punch items carriedSea trialSigned — 5 punch items carriedPunch closure before redeliveryOwner disputes 3 of 7 as blockingRedelivery protocolBlocked pending punch agreement7 itemscarried across two trials, no shared categorisation of blocking vs non-blockingDeskely categorises punch as blocking or non-blocking the moment it is raised, not at the quay.

    Setting up the register

    The trial agenda and the equipment register are the same structure, not two documents.

    Harbour acceptance trial and sea trial agenda items — speed, manoeuvring, endurance, navigation and communication equipment, safety systems, mission equipment — are linked to the underlying equipment tags and their commissioning records.

    Trial prerequisites are modelled explicitly, so an item cannot be scheduled for sea trials while the equipment beneath it is still open in commissioning.

    This is what lets the trials team plan the agenda against actual readiness rather than the shipbuilding contract's assumed schedule.

    1 · SOURCE DOCUMENTSTrial agenda rev D84 trial itemsSpeed and endurance tria…6 runsManoeuvring trial protoc…12 manoeuvresSafety systems demonstra…28 itemsPARSE + MATCHtag · description · drawing ref2 · ONE TAG REGISTERST-410-SPDSpeed trial — measured mi…PERFORMANCEST-410-CBCrash-stop manoeuvreMANOEUVRINGST-410-FFTFire pump and hydrant testSAFETY SYSTEMSST-410-ME-LDMain engine load testMACHINERYTWO DOCUMENTS DISAGREETrial agenda rev DFire pump and hydrant testSpeed and enduran…Abbreviated descriptionEngineer picks the sourcedecision loggedWeeks of transcription become a draft an engineer reviews.

    Execution

    HAT, sea trials and observations recorded against the vessel, in real time.

    Yard, owner's representative and class surveyor observations are captured on tablets during harbour and sea trials, against the specific system or equipment being tested.

    Punch from trials is raised immediately with photos and categorised by whether it blocks delivery, redelivery or is acceptable to carry with a guarantee obligation.

    Trial results — speed, fuel consumption, manoeuvring, DP proving, endurance — are held against the vessel record alongside the commissioning history that led to them.

    TRIAL READINESS THROUGH REDELIVERYSea trials and deliveryPre-trial readiness reviewAll prerequisite records signedHarbour acceptance trialsCertificate issued, 2 items carriedSea trialsRunning — 5 items raised so farPunch closure or categorisationBlocking vs non-blocking sorted liveRedelivery protocolAwaiting punch agreementOwner acceptanceAwaiting redelivery protocolEvery carried punch item has an owner and a category from the moment it is raised.

    Delivery and redelivery

    The delivery protocol reflects what was actually tested, not what was planned.

    The protocol of delivery, or redelivery certificate for a retrofit, is issued from the trial results and the punch position at the time of signing, with carried items listed by owner and date.

    The full dossier — commissioning records, trial results, class and flag correspondence, and outstanding punch — passes to the owner as one package rather than a folder assembled the week of handover.

    That dossier is also what the owner's technical team uses to manage guarantee claims during the warranty period.

    AUDIT QUERYST-410-FFTHull 410 · sea trial · fire pump and hydrant testFull history retrieved in one queryRUNTrial run recordYard trial teamDay 2CAPFire pump capacity readingEquipment makerDay 2WITClass witness recordClass surveyorin progressOWNOwner's superintendent sign-offOwner's site teamin progressCERTIFICATEPODProtocol of deliverypendingOwner, yard and classPrerequisites demonstratedThe delivery dossier exports the full trial history the moment the protocol of delivery is signed.

    The trial route, the weather window and who is on board

    A sea trial is booked once, and if the weather or an unresolved prerequisite loses the slot, the next one might be weeks away.

    Sea trials require a booked route, a weather window that meets the trial specification's sea state limits, and every witnessing party — owner's representative, class surveyor, flag state where required — on board on the same day, a coincidence that gets harder to repeat the longer a vessel sits waiting on an unresolved commissioning item.

    Losing a trial slot because one system's prerequisite records were not actually closed, discovered only when the surveyor asks for them at the quay, costs the yard the weather window and every witnessing party's calendar, not just the day itself.

    Deskely surfaces trial readiness against the same prerequisites the surveyor will ask for before the vessel leaves the berth, so a slipped record is caught days before the trial date rather than at the gangway with the pilot already on board.

    REDELIVERY PROTOCOLPunch carried, categorised, signedEvery carried punch item has an owner, a category and a due date at signatureREDELIVERY PROTOCOL CONTENTSHarbour trial certificate and 2 carried itemsSea trial certificate and 5 carried itemsBlocking vs non-blocking categorisation agreedOwner countersignature on carried punchWHAT ENDS THE QUAYSIDE DISPUTEPunch categorised the moment it was raised, not renegotiated at redeliveryBoth parties sign the same record, not two competing lists7 itemscarried, all with an owner and a category on recordRedelivery is a documented event between yard and owner, not a dispute settled on the quay.

    How it runs

    From last commissioning record to a signed protocol.

    Trials are the least forgiving phase of a build programme, which is exactly why they should run on the same register as everything before them.

    1. 01

      Link the trial agenda

      HAT and sea trial agenda items linked to the underlying equipment tags and commissioning records.

    2. 02

      Model trial prerequisites

      Trial readiness gated on commissioning completion, so items cannot be scheduled while open beneath them.

    3. 03

      Capture observations live

      Yard, owner and class observations recorded against the system being tested during the trial itself.

    4. 04

      Categorise trial punch

      Findings marked as blocking delivery, blocking redelivery, or carriable under guarantee, with owners and dates.

    5. 05

      Record trial results

      Speed, manoeuvring, endurance, DP proving and other results held against the vessel record.

    6. 06

      Issue the protocol

      Delivery or redelivery certificate issued from signed trial results, with the full dossier exported to the owner.

    FAQ

    Questions about Sea trials and delivery scopes.

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