Can a foreign vessel leave Turkey while a maritime accident, pollution, customs or criminal investigation is pending? Learn when Turkish authorities can prevent departure, cancel port clearance and how shipowners can obtain release in 2026.

A foreign vessel involved in a maritime accident, collision, pollution incident, crew injury, cargo incident or other investigation in Turkey is not automatically required to remain in Turkey merely because an investigation is pending. The decisive question is whether a competent Turkish authority or court has imposed a legally effective restriction preventing departure or whether the conditions required for port clearance are no longer satisfied. Under the Turkish port regime, commercial vessels departing beyond the relevant port administrative area ordinarily require a Port Clearance Certificate. The applicable rules expressly allow the port authority to refuse clearance, or cancel clearance already issued, where the vessel is found not to be seaworthy or where information reaches the port authority establishing another circumstance preventing departure. (Kocaeli Liman Başkanlığı) Therefore, the existence of an investigation and the existence of a departure prohibition must be analyzed separately. A routine accident investigation may continue after a foreign ship sails if the authorities have collected the necessary evidence and no independent restriction remains, while a serious collision, pollution allegation, technical deficiency, judicial arrest or criminal investigation may result in the vessel being unable to depart until specific legal or technical requirements have been satisfied.

Does a Pending Maritime Investigation Automatically Detain the Vessel?

No. There is an important distinction between investigation and detention.

Turkish authorities investigate maritime casualties and other incidents for several different purposes. The fact that an incident is being investigated does not itself mean that the vessel has automatically become arrested, seized or indefinitely prohibited from leaving Turkish waters.

The shipowner should therefore ask a very precise question:

Is there currently a legally effective measure preventing this vessel from sailing?

If the answer is no and all applicable departure requirements are satisfied, the existence of an ongoing investigation does not necessarily mean the vessel must remain physically in Turkey.

Port Clearance Is the Immediate Practical Issue

A commercial ship cannot simply depart because the master and owner believe the investigation has finished sufficiently.

Under the applicable port rules, departure beyond the port administrative area generally requires a Port Clearance Certificate issued by the port authority. The authorities examine matters including seaworthiness, manning, passenger and cargo conditions and mandatory documentation before clearance is issued. (Kocaeli Liman Başkanlığı)

Most importantly for a vessel involved in an investigation, the rules provide that where the vessel is discovered to be unseaworthy or information concerning another circumstance preventing departure reaches the port authority, clearance may be refused or an already issued Port Clearance Certificate may be cancelled. (Kocaeli Liman Başkanlığı)

This makes the port authority’s position critical.

Why Is the Vessel Under Investigation?

The legal strategy depends almost entirely on the reason for the investigation.

A vessel involved in a minor berthing incident presents a very different case from a tanker suspected of causing substantial marine pollution.

Likewise, a technical safety investigation differs from a prosecutor investigating a fatal crew accident.

The shipowner should identify exactly which proceeding is pending and which authority is conducting it.

Maritime Casualty Investigation

Turkey has an established transportation-safety investigation system covering maritime casualties. Official records show continuing investigation and reporting of incidents including collisions, groundings, fires, explosions, occupational accidents and persons falling overboard. (ulasimemniyeti.uab.gov.tr)

A casualty investigation generally seeks to understand the circumstances and causes of an accident and improve transportation safety.

The existence of such an investigation should not automatically be confused with a judicial arrest of the vessel.

Administrative Investigation

A Regional Port Authority may also conduct administrative proceedings relating to a maritime incident. Official port authority descriptions specifically include administrative investigations, administrative sanctions, maritime casualties, marine pollution, Port Clearance Certificate procedures and vessel detention/release procedures among port functions. (İstanbul Bölge Liman Başkanlığı)

This means several regulatory questions can arise from one incident.

The owner should establish whether the investigation itself is continuing but the vessel is cleared to sail, or whether an independent administrative restriction remains in force.

Criminal Investigation

The situation becomes more complicated where a public prosecutor is investigating a potential criminal offense.

A serious collision may involve death or personal injury. A pollution incident may raise criminal allegations. Smuggling or cargo irregularities can also lead to criminal proceedings.

In such cases, the investigation may concern the master, officers, crew, company representatives, cargo or evidence onboard the vessel.

The vessel’s ability to leave must be considered separately from restrictions imposed on individual persons.

A Master May Face Restrictions Even If the Vessel Can Sail

This distinction can be commercially important.

The authorities may require a master or crew member to give a statement, and criminal procedure affecting that individual can continue even if the ship itself is ultimately permitted to depart.

The owner should therefore avoid assuming that:

“The vessel has been released, therefore everyone onboard is free from all restrictions.”

Those are separate legal questions.

Likewise, Crew Restrictions Do Not Necessarily Mean the Vessel Must Remain

If a particular officer is subject to an individual judicial restriction, the owner should determine whether legally compliant replacement arrangements can allow the vessel to resume service.

Crew certification and safe-manning requirements must still be satisfied.

Collision Investigation

After a collision in Turkish waters or a Turkish port, authorities may need statements, vessel records, electronic data and technical evidence.

The shipowner should cooperate promptly with lawful evidence requests while simultaneously determining whether a formal sailing restriction exists.

The investigation should not be allowed to become an undefined commercial detention simply because no one has clarified the vessel’s status.

Preserve VDR Data Immediately

Following a serious collision or casualty, Voyage Data Recorder information can be crucial.

The owner should ensure relevant electronic evidence is preserved before routine overwriting occurs.

Bridge logs, charts, AIS information, radar information, communications, engine records, photographs and other relevant material should also be preserved.

Independent Survey Evidence Can Be Important

The owner, hull insurer or P&I interests may wish to arrange appropriate independent technical examination.

This can assist both the investigation and later civil litigation.

Evidence concerning the vessel’s physical condition should be preserved before repairs materially alter it where this can lawfully be done.

Can the Vessel Leave After a Collision?

Potentially, yes.

A collision does not automatically mean the vessel must remain in Turkey until every civil, administrative and criminal issue has been finally decided.

The practical questions are whether the authorities have completed necessary immediate evidence collection, whether the vessel remains seaworthy, whether any judicial or administrative restriction exists and whether port clearance can legally be issued.

Seaworthiness Can Independently Prevent Departure

Even if the investigation itself does not require detention, collision damage may make the vessel unsafe to sail.

The applicable port rules permit refusal of departure clearance where the vessel is not seaworthy. (Kocaeli Liman Başkanlığı)

Therefore, the owner may have two separate problems:

Investigation status + Technical sailing condition.

Resolving only one may not release the vessel.

Port State Control Detention

A foreign ship can also face inspection and detention because of serious safety deficiencies.

Turkey’s Directorate General of Maritime Affairs maintains a specific inspection framework, including instructions concerning vessel inspections and ships being prohibited from sailing. (Denizcilik Genel Müdürlüğü)

If the ship has been detained for technical deficiencies, completion of an accident investigation alone will not release it.

The deficiencies must be addressed through the applicable inspection and release process.

What If Repairs Are Necessary?

Where collision, grounding, fire or another incident causes damage, the owner should immediately determine whether permanent repairs are necessary before departure or whether an authorized temporary repair and restricted voyage may legally be possible.

Classification society involvement, flag-state requirements, surveyor evidence and Turkish maritime authority requirements may all become relevant.

The owner should not order the vessel to sail simply because the engines remain operational.

Marine Pollution Investigation

Pollution incidents require particularly careful handling.

A vessel suspected of discharging oil, fuel or another pollutant may face administrative investigation, environmental liability and potentially additional proceedings.

The authorities may require evidence, statements and other steps before departure issues are resolved.

Official Turkish port authority functions expressly include marine pollution procedures alongside maritime accident investigations and detention/release processes. (İstanbul Bölge Liman Başkanlığı)

Pollution Evidence Should Be Preserved Immediately

The shipowner should preserve relevant logbooks, Oil Record Book entries, engine-room records, tank information, bunker records, photographs, video, electronic data and communications.

Crew members involved in relevant operations should be identified.

Independent sampling or survey evidence may also become important depending on the allegation.

Do Not Assume Nearby Pollution Came From the Vessel

A vessel’s presence near an oil slick does not by itself resolve causation.

The defense should examine location, timing, current and wind conditions, substance characteristics, other vessels and facilities in the area and available technical evidence.

However, the immediate departure question remains separate: has the competent authority actually cleared the vessel?

Customs Investigation

A vessel may also become involved in an investigation concerning cargo, stores, fuel, customs declarations, prohibited goods or smuggling allegations.

The owner should establish whether the investigation targets the ship itself, cargo interests, shipper, consignee, customs declarant, charterer or particular crew members.

The mere fact that disputed cargo is onboard does not automatically establish criminal or administrative liability of the registered owner.

Cargo Can Sometimes Be the Real Problem

Suppose authorities investigate a container because its declared contents allegedly differ from the actual goods.

The vessel may simply be the carrier.

The owner should preserve the bill of lading, manifest, shipper instructions, booking records and relevant declarations.

The legal team should then seek to separate the carrier and vessel from the disputed cargo where the facts justify doing so.

Maritime Investigation and Ship Arrest Are Different

A vessel involved in an accident may also be arrested by a private claimant.

For example, after a collision, the owner of another vessel may seek precautionary arrest to secure a maritime claim.

Even if the administrative accident investigation no longer prevents departure, the ship may remain unable to sail because a judicial arrest is still effective.

The owner therefore needs a complete restriction check.

Providing Security May Resolve a Private Arrest

Where the obstacle is judicial arrest securing a monetary maritime claim, appropriate substitute security may permit release while the underlying dispute continues.

That issue is distinct from satisfying an administrative investigation.

A vessel can theoretically have both restrictions at the same time.

Example: Collision Followed by Multiple Restrictions

Assume a foreign bulk carrier collides with another ship near a Turkish port.

The authorities begin a casualty investigation.

The vessel suffers bow damage.

A prosecutor investigates injuries to crew members.

The other shipowner obtains judicial arrest for a collision claim.

The port authority refuses departure because technical questions remain.

There is not one single “detention.”

There are several independent legal issues.

Obtaining release from the maritime claimant will not automatically resolve the technical restriction. Completing repairs will not automatically remove the judicial arrest. Providing crew statements will not automatically produce port clearance.

Every restriction must be cleared separately.

Ask for the Legal Basis of Every Restriction

Foreign owners should not accept vague statements such as:

“The investigation is still open, so the vessel cannot leave.”

The legal team should identify the competent authority, written decision or administrative basis and the exact condition that must be satisfied before departure.

This makes it possible to challenge unnecessary delay.

Can the Owner Challenge an Unreasonable Delay?

Potentially, yes, depending on the nature of the measure.

The appropriate remedy differs depending on whether the obstacle arises from an administrative decision, judicial order, criminal investigation or technical detention.

The first step is therefore obtaining a written and legally identifiable measure.

Without knowing what legally prevents departure, it is difficult to challenge the restriction effectively.

Administrative Detention Requires an Administrative Strategy

Where the port or maritime authority has formally prohibited sailing, the owner should examine the applicable administrative remedy and whether urgent judicial protection is available.

The argument should address the actual reason for detention.

If the authority says the vessel is technically unsafe, submitting commercial evidence about charter losses will not by itself establish seaworthiness.

Technical evidence will be required.

Judicial Arrest Requires a Maritime Security Strategy

Where a court has arrested the vessel to secure a maritime claim, the owner should examine the claimant’s entitlement, vessel ownership, amount claimed and possibility of release against substitute security.

The administrative investigation may be irrelevant to that particular arrest.

Criminal Evidence Issues Require Separate Treatment

If prosecutors require access to electronic equipment, records or other evidence onboard, the owner should determine whether the evidence can be preserved or copied in a legally acceptable way without requiring the entire vessel to remain indefinitely.

The objective should be to protect the integrity of evidence while avoiding unnecessary operational detention where the law permits.

Can Authorities Keep the Vessel Until the Entire Investigation Ends?

Not necessarily.

Some investigations can continue for months. The mere fact that a final investigation report has not yet been issued does not mean that the physical ship must always remain in Turkey throughout that period.

Turkey’s official maritime safety investigation records demonstrate that formal casualty reports may be issued well after the underlying incident. (ulasimemniyeti.uab.gov.tr)

The relevant question is whether continued physical detention remains legally required for a specific reason.

This Distinction Is Crucial for Foreign Shipowners

If every vessel had to remain until a final casualty report was completed, maritime commerce could be disrupted for extremely long periods.

Instead, the owner should focus on satisfying immediate evidence, safety, administrative and judicial requirements necessary for lawful departure while allowing the underlying investigation to continue.

Insurance Notification

The owner should notify relevant insurers immediately.

A P&I Club may become involved in casualty response, pollution claims, crew matters, third-party claims and security arrangements.

Hull insurers may be involved where the vessel itself is damaged.

Prompt coordination can materially accelerate technical and legal response.

Charterparty Consequences

A detention may create disputes concerning hire, off-hire, indemnities, delay and responsibility for the underlying incident.

The charterparty should therefore be reviewed from the first day.

The fact that Turkish authorities prevented departure does not itself determine which contracting party ultimately bears the financial consequences.

Record the Financial Cost of Detention

The owner should document daily economic loss from the beginning.

This can include port expenses, additional agency charges, crew expenses, bunker consumption, charter hire consequences, missed employment and other measurable losses.

If the detention later proves legally unjustified, contemporaneous financial records may become important.

Cargo Interests Must Be Managed

Cargo may remain onboard while the vessel is investigated.

The owner should consider cargo condition, delivery obligations, transshipment possibilities, perishable goods and communications with cargo interests.

A prolonged detention can transform a maritime casualty into multiple cargo disputes.

Can Cargo Be Discharged While the Vessel Remains Detained?

Potentially, depending on the circumstances and instructions of the competent authorities.

The owner should not assume that detention automatically prohibits every cargo operation.

Where lawful, discharge or transshipment can sometimes reduce commercial losses while the vessel itself remains unable to depart.

What About the Crew?

Crew welfare and legal rights continue throughout detention.

Wages, provisions, medical requirements and immigration status must remain properly managed.

Where individual crew members are required for statements or proceedings, their personal legal status should be checked separately.

Replacement Master or Officer

If a particular officer cannot leave Turkey because of an individual judicial restriction, the shipowner may need to explore whether a qualified replacement can lawfully permit the vessel to sail after all other restrictions are removed.

Safe-manning and certification requirements remain mandatory.

First 6 Hours After an Incident

The shipowner should notify the local agent, insurers and maritime counsel; preserve VDR and other electronic evidence; secure logs and records; determine whether anyone has been injured; identify environmental consequences; obtain information concerning any administrative or judicial restrictions; and confirm whether port clearance has been suspended.

The objective is to prevent both evidence loss and unnecessary operational delay.

First 12 Hours

The owner should determine every authority involved and what each authority requires.

This may include the Regional Port Authority, safety investigators, prosecutors, customs authorities or another competent body depending on the incident.

Technical surveyors and classification representatives should be mobilized where vessel condition is relevant.

First 24 Hours

The legal team should create a complete restriction matrix showing:

Authority → Investigation → Written Measure → Legal Basis → Required Action → Responsible Party → Release Condition.

This makes it much easier to distinguish matters that have already been resolved from those still preventing departure.

Before Requesting Departure

The owner should confirm that required evidence has been provided or preserved, mandatory statements have been completed where applicable, technical deficiencies have been addressed, classification or survey requirements have been satisfied, no judicial arrest remains, no customs restriction remains, no environmental hold remains and the port authority is legally able to issue or maintain the necessary clearance.

The vessel should not attempt to sail until departure is formally lawful.

Never Attempt to Leave Despite a Formal Restriction

A master should not treat detention as a commercial inconvenience that can simply be ignored.

Departing despite a valid administrative or judicial prohibition could substantially worsen the owner’s and master’s legal position.

The correct strategy is urgent release, not unauthorized departure.

Can Security Help the Vessel Leave?

Sometimes.

Security is particularly relevant where a private maritime claim has resulted in judicial arrest. It may also become relevant to particular liabilities arising from an incident.

However, security does not automatically cure technical unseaworthiness or eliminate a criminal evidence requirement.

The owner must identify which restriction the proposed security actually resolves.

P&I Security

Where third-party maritime claims are involved, appropriate P&I-backed security can sometimes help resolve a claimant’s need for security while allowing the vessel to resume trading.

The wording and acceptability of the security must be assessed carefully.

Providing security should not unintentionally constitute an admission of liability.

What If the Investigation Finds No Violation?

The vessel may be released once no independent legal obstacle remains.

The owner should obtain clear documentation concerning the lifting of any formal detention and confirm that departure clearance can be issued.

Evidence of detention costs should nevertheless be preserved where the owner considers pursuing a later compensation claim.

2026 Emergency Strategy for a Foreign Ship Under Investigation in Turkey

The shipowner should begin by separating the existence of the maritime investigation from the existence of a legal departure restriction. Turkish port rules require departure clearance for relevant commercial vessels and permit the port authority to refuse or cancel clearance where the vessel is unseaworthy or another circumstance preventing departure becomes known. (Kocaeli Liman Başkanlığı) Official port authority responsibilities also distinguish maritime accident investigations, pollution matters, administrative investigations and vessel detention/release procedures, demonstrating why the exact legal basis must be identified rather than treating every investigation as one generic detention. (İstanbul Bölge Liman Başkanlığı) The owner should identify every authority involved, obtain each written restriction, preserve evidence, complete necessary crew statements, arrange technical inspections, remedy safety deficiencies, address pollution or customs requirements and determine whether a separate judicial ship arrest exists. Where a private maritime claimant has arrested the vessel, substitute security and judicial release should be evaluated independently. Once every legal, technical and administrative obstacle has been removed, the owner should obtain or confirm port clearance before departure. The practical roadmap is therefore: identify the incident → preserve VDR and vessel records → notify insurers → appoint local maritime counsel → identify every investigating authority → obtain written detention decisions → distinguish investigation from formal detention → check judicial arrest → check criminal restrictions → check customs restrictions → check environmental restrictions → inspect vessel damage → complete necessary repairs → obtain technical approval → arrange security where appropriate → seek removal of each restriction → confirm crew status → confirm seaworthiness → obtain Port Clearance Certificate → verify that no independent hold remains → sail only after formal clearance → continue defending the investigation after departure where required.

Frequently Asked Questions

1. Can a foreign ship leave Turkey while an accident investigation is still open?

Potentially, yes. The existence of an ongoing investigation does not automatically require the vessel to remain in Turkey until a final report is issued. The decisive issue is whether a valid departure restriction remains and whether port-clearance requirements are satisfied.

2. Does a maritime investigation automatically amount to ship arrest?

No. A maritime safety or administrative investigation is legally different from judicial arrest securing a private maritime claim.

3. Can the port authority refuse to let the ship leave?

Yes. The applicable port rules allow departure clearance to be refused, or existing clearance to be cancelled, where the vessel is not seaworthy or information concerning another circumstance preventing departure reaches the port authority. (Kocaeli Liman Başkanlığı)

4. Can the vessel leave after a collision?

Potentially, once the necessary investigation steps have been completed, the vessel is seaworthy, no judicial or administrative restriction remains and the necessary departure clearance is available.

5. Can the ship leave while the captain remains under investigation?

Potentially, but the captain’s individual legal status, replacement arrangements, safe-manning requirements and all vessel-specific restrictions must be examined separately.

6. Can providing security allow the ship to depart?

It may resolve a judicial arrest or another security-based issue, but security does not automatically resolve technical unseaworthiness, customs restrictions, criminal evidence requirements or every administrative detention.

7. Can a vessel be prevented from leaving because of pollution allegations?

Yes, depending on the applicable investigation and measures imposed. Pollution proceedings should be addressed separately from casualty investigation and private maritime claims.

8. What happens if the vessel is technically damaged?

Departure clearance can be refused if the vessel is not seaworthy. Repairs, surveys, classification involvement or another legally approved technical solution may therefore be necessary before departure. (Kocaeli Liman Başkanlığı)

9. Can the shipowner challenge prolonged detention?

Potentially, yes. The available remedy depends on whether the restriction is administrative, judicial, criminal or technical. Obtaining the written legal basis of the detention is therefore the first step.

10. What is the most important step for a foreign shipowner?

Determine exactly what currently prevents the vessel from sailing. An investigation, judicial arrest, technical detention, customs hold and criminal measure require different legal solutions.

Legal Support for Foreign Shipowners During Maritime Investigations in Turkey

Foreign shipowners, operators, charterers, P&I interests and international maritime companies facing investigations in Turkey may require urgent assistance with vessel detention, maritime casualty investigations, collision proceedings, pollution allegations, port clearance, ship arrest, customs restrictions, criminal investigations and emergency vessel release.

Firat Fesih Kaya Law Office assists foreign shipowners and international maritime businesses facing maritime investigations and vessel restrictions in Turkey. Firat Fesih Kaya can assist with identifying the legal basis of a detention, coordinating with the relevant authorities, challenging unnecessary restrictions, addressing judicial arrest or security requirements and pursuing the vessel’s lawful release and departure.

Phone: +90 312 434 22 22
Mobile Phone: +90 532 769 22 22
Email: info@firatfesihkaya.av.tr
Address: Mevlana Boulevard No: 221, Yildirim Tower, Balgat, Cankaya / Ankara, Turkey