Worksheet 16 · Skill 7
Doubling the angle on the bow
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Steering 144°T at 8.3 kn, at 0805 you see Gannet Rock daybeacon 35° on the starboard bow. At 0811 it is 70° on the starboard bow.
How far off the object are you at 0811? If you hold your course and there is no current, how far off will you pass when it is abeam?
Tolerance: 0.05 nm.
Distance off at 0811: ________ nm Distance off when abeam: ________ nm
Steering 291°T at 5.9 kn, at 1140 you see Westfield church spire 20° on the port bow. At 1154 it is 40° on the port bow.
How far off the object are you at 1154? If you hold your course and there is no current, how far off will you pass when it is abeam?
Tolerance: 0.05 nm.
Distance off at 1154: ________ nm Distance off when abeam: ________ nm
Steering 315°T at 7.9 kn, at 1035 you see Westfield church spire 25° on the port bow. At 1044 it is 50° on the port bow.
How far off the object are you at 1044? If you hold your course and there is no current, how far off will you pass when it is abeam?
Tolerance: 0.05 nm.
Distance off at 1044: ________ nm Distance off when abeam: ________ nm
Steering 128°T at 10.2 kn, at 1230 you see Gannet Rock daybeacon 25° on the starboard bow. At 1248 it is 50° on the starboard bow.
How far off the object are you at 1248? If you hold your course and there is no current, how far off will you pass when it is abeam?
Tolerance: 0.05 nm.
Distance off at 1248: ________ nm Distance off when abeam: ________ nm
Steering 099°T at 10.0 kn, at 0935 you see Tern Island tower 40° on the starboard bow. At 0944 it is 80° on the starboard bow.
How far off the object are you at 0944? If you hold your course and there is no current, how far off will you pass when it is abeam?
Tolerance: 0.05 nm.
Distance off at 0944: ________ nm Distance off when abeam: ________ nm
Steering 269°T at 5.1 kn, at 1755 you see Kittle water tank 30° on the port bow. At 1810 it is 60° on the port bow.
How far off the object are you at 1810? If you hold your course and there is no current, how far off will you pass when it is abeam?
Tolerance: 0.05 nm.
Distance off at 1810: ________ nm Distance off when abeam: ________ nm
Steering 241°T at 9.7 kn, at 1340 you see Heron Point Light 40° on the port bow. At 1358 it is 80° on the port bow.
How far off the object are you at 1358? If you hold your course and there is no current, how far off will you pass when it is abeam?
Tolerance: 0.05 nm.
Distance off at 1358: ________ nm Distance off when abeam: ________ nm
Steering 172°T at 10.5 kn, at 1225 you see Heron Point Light 35° on the starboard bow. At 1239 it is 70° on the starboard bow.
How far off the object are you at 1239? If you hold your course and there is no current, how far off will you pass when it is abeam?
Tolerance: 0.05 nm.
Distance off at 1239: ________ nm Distance off when abeam: ________ nm
Practice Sheet No. 1
Answer key
| No. | Answers | Problem |
|---|---|---|
| 1 | Distance off at 0811: 0.83 nm Distance off when abeam: 0.78 nm | No. 16001 (worked solution) |
| 2 | Distance off at 1154: 1.38 nm Distance off when abeam: 0.88 nm | No. 16002 (worked solution) |
| 3 | Distance off at 1044: 1.19 nm Distance off when abeam: 0.91 nm | No. 16003 (worked solution) |
| 4 | Distance off at 1248: 3.06 nm Distance off when abeam: 2.34 nm | No. 16004 (worked solution) |
| 5 | Distance off at 0944: 1.50 nm Distance off when abeam: 1.48 nm | No. 16005 (worked solution) |
| 6 | Distance off at 1810: 1.28 nm Distance off when abeam: 1.10 nm | No. 16006 (worked solution) |
| 7 | Distance off at 1358: 2.91 nm Distance off when abeam: 2.87 nm | No. 16007 (worked solution) |
| 8 | Distance off at 1239: 2.45 nm Distance off when abeam: 2.30 nm | No. 16008 (worked solution) |