Maritime and Marine Vessel Operations and Seamanship 1 — Questions and Answers
Question 1: What does the term 'draft' refer to on a vessel?
- The vertical distance from the waterline to the lowest point of the keel (Correct answer)
- The horizontal width of the vessel at its widest point
- The total length of the vessel from bow to stern
- The height of the vessel above the waterline
Correct answer: The vertical distance from the waterline to the lowest point of the keel
Draft is the vertical distance between the waterline and the keel's lowest point, determining minimum water depth needed for navigation.
Question 2: What is the purpose of the anchor's scope, and what is the recommended scope in normal conditions?
- The length of anchor rode deployed; 5:1 to 7:1 ratio of rode to water depth (Correct answer)
- The weight of the anchor; minimum 1 lb per foot of vessel length
- The type of anchor used; Danforth for sand, plow for rock
- The distance from anchor to vessel; minimum 50 feet in all conditions
Correct answer: The length of anchor rode deployed; 5:1 to 7:1 ratio of rode to water depth
Scope is the ratio of anchor rode length to water depth; a 5:1 to 7:1 ratio provides proper holding power in normal conditions.
Question 3: What is 'apparent wind' on a sailing vessel?
- The combination of true wind and the wind created by the vessel's own movement (Correct answer)
- The actual wind direction measured at the masthead
- The wind speed displayed on the ship's weather instruments
- The wind experienced at sea level compared to aloft
Correct answer: The combination of true wind and the wind created by the vessel's own movement
Apparent wind is the wind felt aboard a moving vessel, which is the vector combination of true wind and the boat's own forward speed.
Question 4: What is 'leeway' as it applies to vessel navigation?
- The sideways drift of a vessel caused by wind or current pushing her off course (Correct answer)
- Extra clearance maintained from a navigational hazard
- The difference between magnetic and true course
- Slack in the steering system allowing rudder play
Correct answer: The sideways drift of a vessel caused by wind or current pushing her off course
Leeway is the lateral drift of a vessel downwind or downcurrent from her intended course, which must be corrected to maintain proper track.
Question 5: What does a vessel's 'trim' refer to?
- The fore-and-aft balance of the vessel, comparing forward and aft drafts (Correct answer)
- The list of the vessel measured from side to side
- The speed at which the vessel planes on the water
- The angle between the vessel's keel and the horizontal
Correct answer: The fore-and-aft balance of the vessel, comparing forward and aft drafts
Trim describes whether a vessel is deeper at the bow (trimmed by the head) or stern (trimmed by the stern) based on fore-and-aft draft difference.
Question 6: What does 'heaving to' mean in sailing terminology?
- A technique to slow or stop a sailing vessel by backing the headsail and lashing the tiller (Correct answer)
- Throwing a line to another vessel or a dock
- The process of raising and securing the anchor
- Turning the vessel directly into the wind to stop forward motion
Correct answer: A technique to slow or stop a sailing vessel by backing the headsail and lashing the tiller
Heaving to involves backing the headsail, adjusting the mainsail, and lashing the tiller to create a stable, nearly stopped condition at sea.
Maritime and Marine Vessel Operations and Seamanship 1
What does the term 'draft' refer to on a vessel?