When a serious boating accident occurs — especially one involving injury, death, or significant property damage — the U.S. Coast Guard may launch a formal investigation. These investigations are not just routine paperwork; they’re structured inquiries that can determine liability, trigger enforcement actions, and influence civil or criminal outcomes.

This guide explains what happens during a Coast Guard investigation, how evidence is collected, and what boaters, victims, and attorneys should expect throughout the process.


⚓ When Does the Coast Guard Investigate?

The Coast Guard typically investigates boating accidents that involve:

  • Death or disappearance of a person
  • Serious injury requiring medical treatment
  • Property damage exceeding $2,000
  • Total loss of a vessel
  • Commercial vessels or incidents in navigable waters
  • Suspicion of Boating Under the Influence (BUI) or criminal negligence

Investigations may be triggered by a Boating Accident Report (CG-3865), a distress call, or direct observation by Coast Guard personnel.


🧭 Phases of a Coast Guard Investigation

1. Initial Response

  • Officers secure the scene, assist victims, and prevent further harm.
  • They may board vessels, interview operators, and assess immediate safety violations.

2. Evidence Collection

  • Photographs, diagrams, and GPS data
  • Witness statements and operator interviews
  • Vessel registration and inspection records
  • Field sobriety tests or chemical testing (if impairment is suspected)

3. Documentation and Reporting

  • A formal Marine Casualty Investigation Report may be created.
  • The Boating Accident Report (CG-3865) is filed by the operator and reviewed by investigators.

4. Legal Review

  • Findings may be forwarded to federal prosecutors or state authorities.
  • Violations of federal law (e.g., BUI, negligence, failure to report) may result in citations or criminal charges.

5. Public Record and FOIA Access

  • Final reports may be requested via the Freedom of Information Act (FOIA).
  • Sensitive or ongoing cases may be redacted or withheld.

🧾 What the Coast Guard Looks For

Investigators assess:

  • Compliance with navigational rules and right-of-way
  • Safety equipment (life jackets, fire extinguishers, signaling devices)
  • Operator behavior (speed, attention, impairment)
  • Vessel condition and maintenance
  • Environmental factors (weather, visibility, water conditions)

They may also evaluate whether commercial operators followed licensing, capacity, and inspection requirements.


⚠️ Legal Consequences of Coast Guard Findings

OutcomeImpact
Safety violationsFines, citations, or mandatory training
Negligence or recklessnessCivil liability or criminal charges
BUI or drug impairmentArrest, license suspension, or felony charges
Failure to reportPenalties under federal and state law
Commercial violationsBusiness license revocation or federal sanctions

Findings from a Coast Guard investigation can be used in civil lawsuits, insurance claims, and criminal prosecutions.


🧠 Final Thoughts: Prepare, Comply, and Protect Your Rights

A Coast Guard investigation is a serious process — and its findings can shape the legal and financial outcome of a boating accident. Whether you’re an operator, passenger, or injured party, understanding the procedures and your rights is essential.

If you’re involved in a boating accident under investigation, consult a boat accident attorney. They can help you respond to inquiries, preserve evidence, and protect your interests throughout the process.