https://www.stuvia.com/user/Performance
ASA 106 – ADVANCED COASTAL CRUISING PRACTICE
EXAMINATION – QUESTIONS With Answers and Detailed
Rationales Updated for 2026–2027
SECTION 1: PASSAGE PLANNING & NAVIGATION (Questions)
1. The first step in passage planning is:
A) Plotting the course
B) Determining the vessel's position and destination
C) Checking the weather
D) Fueling the boat
Answer: B
Rationale: Passage planning begins with defining start and end
points, then considering route, hazards, weather, and resources.
2. A "waypoint" is defined as:
A) A point of land
B) A specific geographic position used for navigation
C) A type of buoy
D) A weather system
Answer: B
Rationale: Waypoints are precise positions (latitude/longitude)
used to define a route.
,https://www.stuvia.com/user/Performance
3. The "rhumb line" is a line that:
A) Follows the shortest distance on a sphere
B) Crosses all meridians at the same angle
C) Is only used in celestial navigation
D) Changes course continuously
Answer: B
Rationale: A rhumb line maintains a constant bearing, crossing
meridians at equal angles.
4. The "great circle" route represents:
A) The longest distance between two points
B) The shortest distance between two points on a sphere
C) A route along the equator only
D) A route that follows a constant bearing
Answer: B
Rationale: Great circle is the shortest path on a sphere.
5. Nautical charts use which projection most commonly?
A) Mercator projection
B) Gnomonic projection
C) Conic projection
D) Cylindrical projection
Answer: A
Rationale: Mercator projection is standard for nautical charts
due to straight rhumb lines.
,https://www.stuvia.com/user/Performance
6. The scale on a chart indicates:
A) Water depth only
B) The relationship between chart distance and actual distance
C) Compass variation
D) Tidal range
Answer: B
Rationale: Chart scale shows the ratio of chart units to real-
world units.
7. A "small-scale chart" covers a ______ area with ______
detail.
A) Small; high
B) Large; less
C) Large; high
D) Small; less
Answer: B
Rationale: Small-scale charts show large areas with less detail.
8. A "large-scale chart" is used for:
A) Ocean crossings
B) Harbor approaches and detailed navigation
C) Coastal overview only
D) Weather routing
Answer: B
Rationale: Large-scale charts provide high detail for confined
waters.
, https://www.stuvia.com/user/Performance
9. The "chart datum" refers to:
A) The highest tide
B) The reference level for soundings and heights
C) The magnetic variation
D) The chart's publication date
Answer: B
Rationale: Chart datum is the water level reference (often mean
lower low water).
10. Soundings on a chart are measured from:
A) Mean high water
B) Chart datum (usually mean lower low water)
C) The sea surface at the time of survey
D) Mean sea level
Answer: B
Rationale: Soundings are depths below chart datum.
11. "Drying heights" on a chart indicate areas that:
A) Are always submerged
B) Are exposed at low tide
C) Are always dry
D) Have no tidal range
Answer: B
Rationale: Drying heights show features above chart datum but
below high water.
ASA 106 – ADVANCED COASTAL CRUISING PRACTICE
EXAMINATION – QUESTIONS With Answers and Detailed
Rationales Updated for 2026–2027
SECTION 1: PASSAGE PLANNING & NAVIGATION (Questions)
1. The first step in passage planning is:
A) Plotting the course
B) Determining the vessel's position and destination
C) Checking the weather
D) Fueling the boat
Answer: B
Rationale: Passage planning begins with defining start and end
points, then considering route, hazards, weather, and resources.
2. A "waypoint" is defined as:
A) A point of land
B) A specific geographic position used for navigation
C) A type of buoy
D) A weather system
Answer: B
Rationale: Waypoints are precise positions (latitude/longitude)
used to define a route.
,https://www.stuvia.com/user/Performance
3. The "rhumb line" is a line that:
A) Follows the shortest distance on a sphere
B) Crosses all meridians at the same angle
C) Is only used in celestial navigation
D) Changes course continuously
Answer: B
Rationale: A rhumb line maintains a constant bearing, crossing
meridians at equal angles.
4. The "great circle" route represents:
A) The longest distance between two points
B) The shortest distance between two points on a sphere
C) A route along the equator only
D) A route that follows a constant bearing
Answer: B
Rationale: Great circle is the shortest path on a sphere.
5. Nautical charts use which projection most commonly?
A) Mercator projection
B) Gnomonic projection
C) Conic projection
D) Cylindrical projection
Answer: A
Rationale: Mercator projection is standard for nautical charts
due to straight rhumb lines.
,https://www.stuvia.com/user/Performance
6. The scale on a chart indicates:
A) Water depth only
B) The relationship between chart distance and actual distance
C) Compass variation
D) Tidal range
Answer: B
Rationale: Chart scale shows the ratio of chart units to real-
world units.
7. A "small-scale chart" covers a ______ area with ______
detail.
A) Small; high
B) Large; less
C) Large; high
D) Small; less
Answer: B
Rationale: Small-scale charts show large areas with less detail.
8. A "large-scale chart" is used for:
A) Ocean crossings
B) Harbor approaches and detailed navigation
C) Coastal overview only
D) Weather routing
Answer: B
Rationale: Large-scale charts provide high detail for confined
waters.
, https://www.stuvia.com/user/Performance
9. The "chart datum" refers to:
A) The highest tide
B) The reference level for soundings and heights
C) The magnetic variation
D) The chart's publication date
Answer: B
Rationale: Chart datum is the water level reference (often mean
lower low water).
10. Soundings on a chart are measured from:
A) Mean high water
B) Chart datum (usually mean lower low water)
C) The sea surface at the time of survey
D) Mean sea level
Answer: B
Rationale: Soundings are depths below chart datum.
11. "Drying heights" on a chart indicate areas that:
A) Are always submerged
B) Are exposed at low tide
C) Are always dry
D) Have no tidal range
Answer: B
Rationale: Drying heights show features above chart datum but
below high water.
