NauticEd International Sailing License and
Credentials (SLC) Exam 300+ Practice Questions
with Verified Answers & Detailed Rationales
2026/2027 Edition
EXAM OVERVIEW & REQUIREMENTS
The SLC exam is a comprehensive 100-question
multiple-choice theory test that must be renewed
every 3 years to maintain your license . It covers
essential knowledge for bareboat chartering,
including navigation, tides, weather, boat systems,
and collision prevention . The exam is part of a 4-
part process: theory (Bareboat Charter Master
bundle and SLC exam), practical on-water
1
,assessment, experience (50 days logged), and
government boater license .
SECTION 1: NAVIGATION TERMINOLOGY &
FUNDAMENTALS
Question 1:
What does "Course Over Ground" (COG) represent?
A) The direction the vessel is heading through the
water
2
,B) The actual direction the vessel is moving over the
earth's surface
C) The compass heading
D) The wind direction
Correct Answer: B) The actual direction the vessel is
moving over the earth's surface
Rationale: COG is the actual direction the vessel is
moving over the earth's surface, accounting for
current and leeway. It differs from heading (where
the bow points) because wind and current can push
the vessel sideways, causing a difference between
heading and COG .
3
, Question 2:
What is "Speed Through Water" (STW)?
A) The speed over the earth's surface
B) The speed through the water without current
effects
C) The wind speed
D) The current speed
4
Credentials (SLC) Exam 300+ Practice Questions
with Verified Answers & Detailed Rationales
2026/2027 Edition
EXAM OVERVIEW & REQUIREMENTS
The SLC exam is a comprehensive 100-question
multiple-choice theory test that must be renewed
every 3 years to maintain your license . It covers
essential knowledge for bareboat chartering,
including navigation, tides, weather, boat systems,
and collision prevention . The exam is part of a 4-
part process: theory (Bareboat Charter Master
bundle and SLC exam), practical on-water
1
,assessment, experience (50 days logged), and
government boater license .
SECTION 1: NAVIGATION TERMINOLOGY &
FUNDAMENTALS
Question 1:
What does "Course Over Ground" (COG) represent?
A) The direction the vessel is heading through the
water
2
,B) The actual direction the vessel is moving over the
earth's surface
C) The compass heading
D) The wind direction
Correct Answer: B) The actual direction the vessel is
moving over the earth's surface
Rationale: COG is the actual direction the vessel is
moving over the earth's surface, accounting for
current and leeway. It differs from heading (where
the bow points) because wind and current can push
the vessel sideways, causing a difference between
heading and COG .
3
, Question 2:
What is "Speed Through Water" (STW)?
A) The speed over the earth's surface
B) The speed through the water without current
effects
C) The wind speed
D) The current speed
4
