Cranes, DP, moonpool, mission equipment
Commissioning software for support vessels where mission equipment is as complex as the ship carrying it.
Platform supply, construction support and walk-to-work vessels carry cranes, moonpools, dynamic positioning, gangways and mission-specific equipment on top of a standard hull. Deskely tracks hull and mission systems in one register with DP trials and equipment acceptance modelled as their own chain, so the vessel is proven as an integrated asset rather than a hull with attachments.
- Systems
- Cranes, DP, moonpool, gangway
- Trials
- DP trials and FMEA
- Class
- DP notation dependent
- Gate
- Sea trials and delivery
Choose your project type
The problem
The hull is proven first, and mission equipment is proven last, under pressure.
Cranes, moonpools, active heave compensation, gangways and DP systems are commissioned by specialist vendors on their own schedules, often arriving late in the build against a fixed delivery date.
When these systems live in separate vendor documentation, the yard discovers integration problems — power management conflicts, DP reference system interference, deck load limits — during sea trials rather than before.
Deskely holds hull, mission equipment and DP systems in one register with cross-system dependencies modelled, so integration issues surface while there is still time to resolve them on the berth.
Setting up the register
Hull, mission equipment and DP are linked subsystems, not separate projects.
Cranes, moonpool and handling systems, gangways, ROV spreads, active heave compensation and DP reference systems each hold their own equipment lists and record sets, cross-linked to the power management system that ties them together.
General arrangements, mission equipment layouts and vendor drawings are parsed into a reviewed register, so every winch, thruster and reference sensor carries its drawing and its interface points.
That structure is what allows the yard to sequence DP trials against actual equipment readiness instead of a fixed calendar date.
Execution
Vendor commissioning and integration testing captured against the same asset register.
Vendors and yard technicians sign installation, functional test and integration records on tablets at the equipment, including power management and thruster allocation logic.
Punch is raised with photos and categorised by whether it blocks DP trials, sea trials or delivery, so DP-critical findings are never mixed in with cosmetic outfit items.
Progress rolls up per mission system and per hull zone, which is the level the trials programme is actually managed at.
Trials and delivery
DP trials and sea trials depend on a chain of equipment and integration evidence.
DP trial and FMEA proving trial readiness depends on individual equipment acceptance and power management commissioning, each enforced as a prerequisite from the records beneath.
The dossier per mission system gives the owner and the class surveyor the test results, settings and drawings needed to close out DP notation and vessel delivery together.
Residual punch from sea trials stays live with owners and dates through to redelivery from the yard rather than disappearing into a trials report.
Moonpool and diving system class notation
A moonpool and a saturation diving system carry their own class notation, and their commissioning does not fit a standard hull acceptance form.
Moonpool structures, diving bells, saturation systems and ROV launch and recovery systems each carry class notations and statutory requirements — pressure vessel certification for the dive system, structural approval for the moonpool opening, life support system testing — that sit outside a conventional hull and machinery commissioning scope.
Confined space entry into the moonpool trunk and diving system compartments during commissioning carries its own hazard profile, and the record of gas testing and permits for that entry is exactly the kind of evidence an owner's rep or class surveyor will ask for months after the vessel is delivered.
Deskely holds moonpool, diving and ROV systems as their own subsystems with their statutory record sets and confined space entry permits attached to the equipment tag, so specialist acceptance evidence is not separated from the vessel's main commissioning record.
How it runs
From steel and thrusters to a vessel proven on station.
Support vessel programmes are dominated by late-arriving mission equipment, which is exactly what a linked dependency register is built to manage.
- 01
Model hull and mission systems
Cranes, moonpool, gangway, DP and ROV systems registered alongside standard hull and machinery.
- 02
Parse equipment and interfaces
General arrangements, mission layouts and vendor drawings drafted into a reviewed tag register.
- 03
Link power management dependencies
Cross-system interfaces recorded as prerequisites so integration issues surface before trials.
- 04
Give vendors scoped access
Each mission equipment vendor signs its own commissioning records while the yard sees one register.
- 05
Run integration and DP trials
Functional, integration and DP/FMEA trial results captured per system with punch categorised on the spot.
- 06
Deliver with a full dossier
Sea trial and delivery certificates issued from signed records, with a per-system pack handed to the owner.
FAQ
Questions about Offshore support vessels scopes.
Keep reading
Marine and shipyard commissioning
The full sector view: build stages, class survey evidence, sea trials and delivery documentation.
Read morePunch lists
Defects raised at the compartment or equipment with photos, categorised by whether they block trials or delivery.
Read moreWalkdowns
Pre-trial and pre-delivery inspections run as structured walks that raise punch on the spot.
Read moreOther marine and shipyard project types: Newbuild vessel construction and trials, Vessel conversions and module integration, Drydock and repair periods, Cruise and ferry refits, Naval and defence vessel completions, LNG/LPG carriers and gas systems, Dual-fuel, scrubber and emissions retrofits, Shipyard facility and drydock infrastructure, Commissioning through sea trials to delivery.
