You have determined the maneuvering...

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Question 1 of 2066636ee728f7522a1c517979

You have determined the maneuvering characteristics of your vessel by taking the radar ranges and bearings of an isolated light while making a turn. The results are listed in illustration D035DG. Based on this data what is the advance for a turn of 30°? Illustration D035DG

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Question 1 of 20

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🔍 Key Concepts

• Definition of advance during a turn (distance gained in the original direction from rudder order until the vessel has turned a specified number of degrees). • Using radar range and bearing from a fixed light to plot your vessel’s track on a maneuvering board or plotting sheet. • Finding the point on the track where the vessel’s heading has changed 30° from the original heading of 333° and measuring the distance along the original course line.

💭 Think About

• From the table, which line marks the moment when left full rudder is ordered, and why is that your starting point for measuring advance? • If the ship is turning left from 333°, what true heading corresponds to a 30° change of course, and between which two recorded headings does this occur? • Once you plot the positions for those two headings, how can you interpolate to estimate the position at exactly a 30° change, and then measure the distance gained along 333° from the rudder‑order position to that interpolated point?

✅ Before You Answer

• Identify the correct starting point: the range/bearing at the instant LEFT FULL RUDDER ORDERED. • Confirm the correct target heading for a 30° turn from 333° (turning left, so heading decreases). • After plotting, measure only the distance parallel to the original course (333°) between the rudder‑order position and the point of 30° change; this fore‑and‑aft distance is the advance, not the total distance traveled along the curve.

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