Maritime Workplace Professionalism, Chain of Command, and Drug-Free Workplace

Maritime Workplace Professionalism

A merchant vessel is a professional workplace regulated by federal law. Employers, the U.S. Coast Guard, and international convention all hold mariners to strict standards of conduct. Professionalism on board means showing up on time, wearing required personal protective equipment, communicating clearly and respectfully, and following orders from senior officers—unless those orders require you to break the law or endanger life. A mariner who understands professional expectations from day one is safer, more employable, and better positioned to advance.

The Chain of Command

Every vessel operates under a clear hierarchy that divides the crew into two primary departments: deck and engine.

Deck Department

• Master – The Master (Captain) holds ultimate legal authority over the vessel and everyone aboard. All orders flow from and through the Master.
• Chief Mate (First Mate) – Second in command on deck; responsible for cargo operations, stability, and crew safety programs.
• Second Mate – Navigation officer and usually the ship's medical officer; maintains charts and publications.
• Third Mate – Junior watch officer; typically responsible for firefighting and lifesaving equipment readiness.
• Able Seaman (AB) – Experienced unlicensed deck rating who stands navigational watch, steers, and performs maintenance.
• Ordinary Seaman (OS) – Entry-level deck rating who assists ABs and performs general seamanship duties.

Engine Department

• Chief Engineer – Head of the engine department; reports to the Master on operational matters.
• First Assistant Engineer – Day-to-day running of the machinery plant; supervises watch engineers.
• Second Assistant Engineer – Typically responsible for boilers, fuel, and related systems.
• Third Assistant Engineer – Junior watch engineer.
• Qualified Member of the Engine Department (QMED) – Unlicensed engine rating who maintains and operates machinery under engineer supervision.
• Wiper – Entry-level engine rating; cleans machinery spaces and assists QMEDs.

Why the chain of command matters for safety: In an emergency, confusion about who gives orders costs lives. When a machinery casualty occurs, the QMED or Wiper on watch reports immediately to the watch engineer (Third or Second Assistant), who reports to the First Assistant Engineer, who reports to the Chief Engineer, who reports to the Master. Each link passes accurate information upward quickly. Bypassing a level—or failing to report at all—slows the response and can violate company SMS (Safety Management System) procedures.

Professional Communication at Sea

Verbal and written communication standards on a vessel are higher than in many shoreside jobs because errors can cause collisions, groundings, or personal injury.

Verbal communication:

• Use clear, simple English (STCW requires English as the working language for safety communications on internationally trading vessels).
• Repeat back critical instructions to confirm understanding—this is called a closed-loop communication or read-back.
• Address senior officers respectfully by title ("Chief," "Captain," "Second Mate").
• Never interrupt a senior officer who is actively navigating or managing an emergency. Wait, then speak.

Written communication:

• Log entries must be factual, dated, timed, and signed. Never erase—draw a single line through an error and initial it.
• Email and written reports to officers should be concise, state the problem clearly, and propose a solution where possible.
• A near-miss incident report must be completed promptly and accurately, even when no injury occurred. Honest reporting improves safety for the whole crew.

Requesting time off or raising a concern: Go to your direct supervisor first. If unsatisfied, follow the company's grievance procedure. Do not go directly to the Master over a routine personnel matter without first speaking to your immediate officer—doing so bypasses the chain of command and damages professional relationships.

Federal Drug and Alcohol Requirements for Merchant Mariners

The U.S. Department of Transportation (DOT) and the U.S. Coast Guard regulate chemical-substance testing for merchant mariners in safety-sensitive positions. These rules exist because impairment at sea endangers the vessel, cargo, crew, and the public.

Types of required testing:

• Pre-employment testing – Required before a mariner begins work in a regulated position.
• Random testing – Conducted throughout the year on an unannounced basis. Your name can come up at any time.
• Post-incident (post-accident) testing – Required after a marine casualty or serious incident to determine whether impairment was a factor.
• Reasonable-cause testing – Ordered by a supervisor when observable behavior suggests impairment.
• Return-to-duty and follow-up testing – Required after a violation before a mariner may return to regulated duties.

The USCG enforces zero tolerance on the water. Federal regulations prohibit any person from operating a vessel while under the influence of alcohol or a controlled substance.

Consequences of a positive test result:

1. Loss or suspension of the mariner's credential – The USCG National Maritime Center may suspend or revoke a Merchant Mariner Credential (MMC). Without a valid credential, you cannot work aboard a regulated vessel.

2. Immediate removal from safety-sensitive duties – The mariner is removed from the vessel or position until the return-to-duty process is complete.

3. Mandatory referral to a Substance Abuse Professional (SAP) – The SAP evaluates the individual and prescribes a treatment or education program before return-to-duty testing may occur.

4. Employer discipline, up to and including termination.

5. Federal civil or criminal penalties depending on circumstances.

Compliance protects your credential, your livelihood, and—most importantly—the lives of your shipmates. A drug-free workplace policy is not just a rule to follow; it is a professional commitment every mariner makes when they apply for a credential.