Legal Definitions - OS

OS stands for Ordinary Seaman.

An Ordinary Seaman (OS) is an entry-level position within the deck department of a merchant vessel or other maritime craft. This role is typically held by individuals who are gaining practical experience at sea and are working towards becoming an Able Seaman. An Ordinary Seaman performs basic duties under the supervision of more experienced crew members, such as chipping rust, painting, cleaning, maintaining deck equipment, assisting with mooring operations, and standing watch. Legally, their classification impacts their wages, responsibilities, and eligibility for certain maritime certifications and benefits.

• Example 1: Cargo Ship Deckhand

  After completing his basic maritime safety training, Alex secured his first job on a large bulk carrier. His daily tasks include assisting the Able Seamen with securing cargo, cleaning the ship's deck, and learning how to operate basic deck machinery like winches under direct supervision. He also helps prepare surfaces for painting and maintains the cleanliness of common areas.

  This illustrates Alex's role as an Ordinary Seaman because he is an entry-level crew member performing fundamental deck duties and gaining initial sea experience. He is learning essential maritime skills and responsibilities before advancing to more skilled positions.

• Example 2: Ferry Crew Member

  On a passenger ferry operating coastal routes, Sarah is an Ordinary Seaman. Her duties include assisting with passenger embarkation and disembarkation, ensuring safety railings are secure, performing routine checks on life rafts, and participating in weekly fire and abandon ship drills. During these drills, she is responsible for guiding passengers to muster stations and assisting senior crew members.

  Sarah's involvement in both routine operational tasks (passenger assistance, safety checks) and critical safety procedures (drills), all under the guidance of more experienced officers and Able Seamen, clearly defines her as an Ordinary Seaman. Her role is crucial for safety and operations but does not require the advanced certifications of a higher-ranking seaman.

• Example 3: Offshore Support Vessel Trainee

  Mark is working as an Ordinary Seaman on an offshore supply vessel that services oil rigs. He spends his shifts assisting with the loading and unloading of supplies, maintaining the vessel's exterior, and standing lookout watch. He is also diligently studying for his Able Seaman certification, accumulating the required sea time and practical knowledge to qualify for more complex responsibilities and a higher pay grade.

  Mark's current status as an Ordinary Seaman is demonstrated by his performance of basic support duties and his active pursuit of the next level of certification (Able Seaman). This highlights that the OS role is often a foundational period for accumulating sea time and practical experience necessary for career advancement in the maritime industry.