Maritime Workplace Hazards and OSHA 10 Maritime

Maritime Workplace Hazards and OSHA 10 Maritime

The maritime industry consistently ranks among the most hazardous occupations in the United States. Deck and engine-room workers face a combination of dangers that rarely appear together in land-based jobs: moving machinery, confined spaces, open water, high voltages, and chemical exposures—often all on the same shift. Understanding these hazards and how to control them is the foundation of every credential you will earn, from STCW Basic Training to your USCG Merchant Mariner Credential.

The Top Maritime Workplace Hazards

Falls overboard and from height. Slippery decks, the absence of guardrails on older vessels, and working aloft on masts or in cargo holds create fall risks. Always wear a properly fitted personal flotation device (PFD) when working near open water and use a fall-arrest harness when working above deck structures.

Confined spaces. Tanks, voids, cofferdams, and chain lockers can contain oxygen-deficient or toxic atmospheres. Entry requires atmospheric testing, a trained attendant outside the space, a rescue plan, and—where required—a permit. Never enter a confined space without authorization and without verifying the atmosphere is safe.

Struck-by hazards. Crane loads, swinging doors in heavy weather, mooring lines under tension (snap-back zones), and loose cargo can strike workers with lethal force. Wear a hard hat and high-visibility vest in cargo and deck work areas; never stand in a snap-back zone when handling lines.

Electrical hazards. Shipboard electrical systems operate at a range of voltages. Wet conditions and metal decks make electrocution a serious risk. Treat all circuits as energized until proven otherwise. Use insulated tools and rubber-soled footwear when working near electrical panels.

Machinery hazards. Engine rooms contain rotating shafts, high-pressure steam lines, and hydraulic systems. Loose clothing and long hair must be secured. Never reach into moving machinery. Guard covers must be in place whenever machinery is running.

Chemical and heat exposures. Fuel, lubricants, refrigerants, and cleaning agents can cause burns, respiratory damage, or systemic poisoning. Read the Safety Data Sheet (SDS) before using any chemical. Use chemical-resistant gloves, eye protection, and respiratory protection as the SDS requires. Engine rooms also produce extreme heat; stay hydrated and recognize signs of heat illness.

Selecting the Right PPE

Matching PPE to the hazard is not optional—it is required by law and by STCW.

| Hazard | Minimum PPE |

|---|---|

| Falling objects, deck work | Hard hat, steel-toed boots |

| Grinding, chipping, chemical splash | Safety glasses or face shield, gloves |

| High-noise spaces (engine room) | Hearing protection (earplugs or earmuffs) |

| Chemical handling | Chemical-resistant gloves, eye protection |

| Working near open water | Coast Guard–approved PFD |

| Electrical work | Insulated gloves, arc-rated PPE if required |

PPE is the last line of defense—engineering controls and administrative controls come first. However, in the maritime environment, PPE is often the most immediately available protection, so knowing how to select and wear it correctly is critical.

OSHA 10-Hour Maritime Outreach Program

OSHA's 10-Hour Maritime Industry outreach program is a voluntary training course authorized by OSHA and delivered by OSHA-authorized instructors. Completing all 10 hours and signing the official attendance sheets makes you eligible to receive the OSHA 10 wallet card—a recognized safety credential that many maritime employers require for hire.

Core topics in the maritime outreach program include:

• Confined space entry
• Falls (overboard and from height)
• Struck-by and caught-between hazards
• Electrical safety
• Lockout/tagout for shipboard machinery
• Rights and responsibilities under the OSH Act

Attendance is mandatory for every session. If you miss any portion of the 10 hours, you are not eligible for the card.

Lockout/Tagout (LOTO) for Marine Machinery

Lockout/tagout is the procedure used to ensure that machinery is fully de-energized and cannot be restarted while someone is working on it. The governing OSHA standard is found in 29 CFR 1910.147 for general industry; maritime applications follow the same core principles.

A proper LOTO sequence for shipboard machinery isolation:

1. Notify all affected personnel that maintenance will begin.

2. Identify all energy sources (electrical, hydraulic, pneumatic, steam, gravity).

3. Shut down the equipment using the normal stopping procedure.

4. Isolate every energy source by opening breakers, closing valves, or blocking stored-energy components.

5. Lock out each isolation point with an individual lock; attach your personal tag.

6. Release or restrain stored energy (bleed pressure, block elevated parts).

7. Verify zero energy: attempt to start the machine; check gauges; test electrical circuits with a properly rated meter.

8. Perform the authorized work.

9. Restore: remove LOTO devices only after tools and workers are clear, guards are replaced, and affected personnel are notified.

Each worker who is exposed to the hazard applies their own lock. No one else removes your lock.

Hazard Identification Logs

Professional mariners document hazards systematically. A Hazard Identification Log entry records the hazard location, the type of hazard, the potential injury, the recommended control, and the PPE required. This format is used in vessel safety management systems and supports the ISM (International Safety Management) Code requirements that apply to most commercial vessels. Getting comfortable with this format now prepares you for daily safety duties on the job.