USCG Able Seaman Credential Examination Exam Blueprint

100Questions
70% per modulePassing Score
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What This Exam Validates

The U.S. Coast Guard (National Maritime Center) administers the USCG Able Seaman Credential Examination to ensure mariners possess the essential skills for safe vessel operations. The examination consists of 100 questions divided into 2 distinct modules. Candidates must achieve a 70% passing score per module to qualify for professional maritime service on U.S. waters.

Who Should Take This Exam

This exam is intended for mariners pursuing an Able Seaman credential. Candidates must demonstrate practical knowledge of navigation rules and deck safety procedures to meet the official U.S. Coast Guard requirements for professional maritime service and vessel operations.

Skills You Should Be Ready to Demonstrate

How to Prepare

Review the official U.S. Coast Guard (National Maritime Center) exam guides for navigation and deck safety. Study the International and Inland Navigation Rules, including light and shape requirements, sound signals, and steering rules across the 2 modules. Familiarize yourself with the conversion tables and legal citations provided in the official documentation to ensure you meet the 70% passing score requirement for each module. Consistent practice with these materials is important for success.

Domain Study Guidance

Q450-Navigation and Rules of the Road: Study Guidance

This domain covers the International and Inland Navigation Rules, including steering, sailing, sound signals, and lights. It focuses on the legal requirements for vessel operations and collision avoidance during maritime navigation to ensure safety at sea.

Q451-Deck General Safety: Study Guidance

This domain addresses general safety practices required for safe deck operations across vessels. It covers the responsibilities of the master and crew, documented safety precautions, and standardized operational safety protocols across various maritime environments and vessel types.

Exam-Day Guidance

Arrive prepared to complete 100 questions across the 2 required modules. Ensure you understand the specific requirements for each section, as you must achieve a 70% passing score per module to successfully earn your credential and demonstrate your professional maritime competency.

Frequently asked questions

How many questions are on the exam?

The USCG Able Seaman Credential Examination consists of 100 questions in total across 2 modules. Candidates should be prepared to answer these questions to demonstrate their proficiency in navigation and deck safety standards required for professional maritime operations.

What is the passing score?

Candidates must achieve a passing score of 70% per module to successfully complete the examination. This requirement ensures that all mariners have a sufficient understanding of the safety and navigation rules necessary for professional operations on U.S. waters.

How long is the exam?

The provided documentation does not specify a duration for the examination. Please check with the U.S. Coast Guard (National Maritime Center) for specific details regarding time limits or any other administrative requirements for your scheduled testing session.

Where can I find the current certification path?

For information regarding the current certification path and requirements, please check with the U.S. Coast Guard (National Maritime Center) for the current certification path. They provide the most accurate and up-to-date guidance for mariners seeking to obtain or renew their professional credentials.

Sources and Verification

Verified 2026-09-14

How this page was made

This editorial was constructed using official U.S. Coast Guard (National Maritime Center) exam guides and navigation rules documentation to ensure alignment with current maritime credentialing standards and regulatory requirements for all candidates seeking professional certification.

Exam Domains

1 Q450-Navigation and Rules of the Road Weight not published
2 Q451-Deck General Safety Weight not published