Navigation & Watchstanding Flashcards
9 cards from real AB practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 9 Navigation & Watchstanding flashcards as text
What is a ship's compass used for?
Answer: Determine direction
A ship's compass is a fundamental navigational instrument used to indicate the vessel's heading relative to magnetic or true north. This allows the crew to maintain a desired course and navigate accurately across the water.
What is the purpose of a watchstanding log?
Answer: Record events during watch
A watchstanding log is an official document kept on the bridge or in the engine room during a watch. It serves to record all significant events, observations, and actions taken, providing a continuous and detailed history of the vessel's operations.
What is a nautical mile?
Answer: 1.1508 miles
A nautical mile is a unit of distance used in marine and aviation navigation, defined as one minute of arc of a great circle. It is approximately 1.1508 statute miles (or 1,852 meters), making it a standard measure for distances at sea.
What is a bearing in navigation?
Answer: Navigational direction
In navigation, a bearing is the horizontal direction of a point or object from an observer, usually expressed as an angle relative to a fixed reference point like true north or the ship's bow. It is crucial for plotting positions and determining courses.
What does a lookout do?
Answer: Observe surroundings
A lookout's primary duty is to maintain a continuous and vigilant watch by sight and hearing for other vessels, navigational hazards, and any changes in the environment. This is essential for preventing collisions and ensuring the safety of the vessel.
What is a helm order?
Answer: Steering instruction
A helm order is a command given to the helmsman (the person steering the ship) to direct the vessel's course. These instructions specify the desired rudder angle or heading, ensuring the ship follows the intended path.
What tool is commonly used for plotting courses?
Answer: Parallel ruler
A parallel ruler is a common navigational tool used on charts to transfer a line of bearing or course from one part of the chart to another, typically to a compass rose. This allows navigators to accurately plot courses and positions.
What does the term 'dead reckoning' refer to?
Answer: Estimated position tracking
Dead reckoning is a method of navigation where a vessel's current position is estimated by calculating the course and distance traveled from a previously known position. It relies on speed, time, and direction, without external fixes, to approximate location.
How often should a watchstander report to the bridge?
Answer: When necessary
A watchstander should report to the bridge whenever there is a significant change in conditions, an observation that requires attention, or an instruction from the officer of the watch. Regular, unnecessary reports would be distracting, but critical information must be communicated promptly.