Question 1 - Steps & Calculations:
Find your 1015 starting position
using latitude and longitude. (Marker RGN)
Convert the given compass course 022°
PSC to True Course.
022 - 2 W deviation - 10 W variation = 010 T
Plot the course on your chart and
label with time, direction, and speed.
Do the time problem, find the elapsed
time (et) between your 1015 departure and your requested 1130 DR.
1130 - 1015 = 1 hr 15 min. (1.25 hours).
Calculate the distance traveled in 1
hour and 15 minutes.
S × T = D - 4 kts × 1.25 hours = 5 nm
Measure this distance on the latitude
scale and measure along the course line. At this point draw the DR symbol and label with
the time.
Find the latitude and longitude of
this 1130 DR position.
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Question
2 - Steps & Calculations:
Start at your 1130 DR.
Convert the given magnetic course 210°
M to True Course.
210 - 10 W variation = 200 T (You don't need the deviation information since you are only going from
magnetic to true.)
Plot the 200 T course on your chart
and label with time, direction, and speed (Don't forget your speed changed.)
Look along the line and identify the
Fl G 4sec "11" BELL
Measure, with your dividers, the
distance from your 1130 DR to the buoy. 2.7 nm
Calculate the time it would take to
get there:
D ÷ S = T - 2.7 nm ÷ 5 kts = .54 hours - .54 ×60 = 32 min
Do the time problem, add the time in
route to your departure time.
1130 +0032 = 1202
Find the latitude and longitude of Fl
G 4sec "11" BELL.
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Question
3 - Steps & Calculations:
Find your 1405 starting position
using latitude and longitude. G "9A" Fl G 4sec BELL
Since your given True course no
conversion is necessary.
Plot the course on your chart and
label with time, direction, and speed.
Do the time problem, find the elapsed
time (et) between your 1405 departure and your requested 1500 DR.
1500 - 1405 = 55 min. (0.92 hours).
Calculate the distance traveled in 55
minutes.
S × T = D - 3 kts × 0.92 hours = 2.8 nm
Measure this distance on the latitude
scale and measure along the course line. At this point draw the DR symbol and label with
the time.
Find the latitude and longitude of
this 1500 DR position.
Check the requested depths
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Question
4 - Steps & Calculations:
Use your 1500 DR as a starting
position. (Remember you don't start
until 1515.)
Find the Latitude and Longitude of
the fishing spot.
Draw a line, which will be your
course line, between the two points.
Find the True direction of this
course line.
Convert the given True course 182°
T to Compass course.
182 + 10 W = 192 M + 2W = 194 C (PSC)
Label the course line on your chart
and label with time (1515), direction, and speed.
With your dividers measure the
distance to the fishing spot. 4.1 nm
Calculate the time it would take to
get to the spot.
D ÷ S = T - 4.1 nm ÷ 6 kts = .68 hours - .68 × 60 = 41 mins
Do the time problem, add 41 minutes
to your 1515 departure.
1515 - 41 = 1556 min
Check the water depth
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Question
5 - Steps & Calculations:
Use the fishing spot as your starting
position.
Draw a line, which will be your
course line, between your starting position and marker R 2 "A".
Find the True direction of this
course line. -338T
Label the course line on your chart
with time (1756) (Remember, you
were here for exactly two hours.),
direction, and speed.
Convert the given True course 338°
T to Compass course.
338 + 10 W = 348 M + 0 = 348 C (psc)
With your dividers measure the
distance from the fishing spot to the marker. 3.6 nm
Do the time problem. What is the
difference in the estimated time enroute (ete) if you have to make the marker by 1830.
1830 - 1756 = 34 min ÷ 60 = 0.57 hours
Calculate the speed it would take to
get to the marker in 34 minutes.
D ÷ T = S - 3.6 nm ÷ .57 hours = 6.3 kts
Find the Latitude and Longitude of
the marker.
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