Diligence the counterparty before the yacht
A shipbuilding contract can run for several years and involve substantial installment payments long before delivery. The owner is therefore taking counterparty risk as well as technical risk.
Review the legal entity that will sign the contract, not only the group brand. Understand ownership, recent delivery history, financial position where available, current workload and whether the proposed project is within the yard's established scale and technical capability. If the contracting company is part of a larger group, determine what support - if any - the parent actually provides.
The same diligence should extend to critical subcontractors when the yacht depends heavily on specialist systems or an outsourced interior. A strong prime contractor can manage that network, but the owner should know where concentrated supplier risk sits.
Follow every installment
Shipbuilding contracts commonly spread the purchase price across milestones. The commercial logic is reasonable: the yard needs cash to procure material and progress construction. The owner's concern is what happens if the project fails before delivery.
Refund guarantees, escrow structures, title to work in progress, ownership of paid-for equipment and termination rights can all matter, depending on the contract and jurisdiction. A refund guarantee is not just a sentence saying money will be returned. Its value depends on the guarantor, the conditions for drawing it, the amount covered and the documentary steps required to make a demand.
Maritime counsel should review these protections alongside the payment schedule. The question is simple even when the documents are not: after each major installment, what exactly does the owner have if the yard cannot complete the yacht?
Separate class, flag and owner oversight
Classification societies and flag administrations provide important independent oversight, but they do not represent the owner's commercial interests.
Class reviews construction and systems against its rules and attends surveys within the applicable class scope. Flag-state requirements address statutory compliance and, for commercial yachts, can include yacht-code certification, safety-management and other audits depending on size and operation. The owner's technical team has a different mandate: verify that the yacht is being built to the contract, specification and quality expected by the owner.
Those functions overlap in places but should not be confused. A piece of joinery can comply with class and still be unacceptable under the owner's finish standard. A system can satisfy the minimum statutory requirement and still fail to meet the performance promised in the specification.
Control information as rigorously as construction
Large builds generate an enormous document trail: approved drawings, revised specifications, class comments, change orders, meeting minutes, inspection reports, equipment certificates and commissioning records.
Version control matters. If the owner team and yard are working from different revisions, disputes become almost inevitable. Every approved change should flow into the controlled specification and drawing set rather than living indefinitely in email.
A disciplined project also tracks open technical decisions and owner approvals. Delayed owner decisions can genuinely affect the schedule, so the owner's side should be as accountable for response times as the yard. Good diligence is not adversarial; it creates a record that lets everyone identify where responsibility sits.
Write acceptance criteria while leverage is highest
The buyer's leverage is generally strongest before the shipbuilding contract is signed. That is when the parties should define the tests that will decide whether the yacht is ready to accept.
Sea-trial protocols can cover speed, maneuvering, steering, stabilizers, machinery loads and system performance. Noise and vibration guarantees should identify measurement locations and operating conditions. Range claims should be tied to defined assumptions. Tank capacities, deadweight and lightweight information may also matter to the operational profile.
The contract should distinguish material non-conformities from punch-list items that can be completed after delivery. It should also say how unresolved defects are documented, secured and corrected. Without that framework, the final weeks of a build can become a negotiation over standards everyone thought were obvious two years earlier.
Diligence continues after delivery
Delivery transfers ownership; it does not end the project. The first operating season often reveals software issues, equipment faults, leaks, finish movement and other defects that were not apparent in commissioning.
The warranty process should identify who receives claims, how they are logged, which costs the yard bears, and how work is handled when the yacht is far from the builder. Owners should also preserve commissioning records and evidence of defects rather than relying on informal conversations with suppliers.
The highest-value new-build diligence is therefore not a single report. It is a structure that protects the owner from contract signing through the end of the warranty period.
These articles are editorial and educational in nature; they are not legal, tax, customs, insurance or regulatory advice.