Worksheet 6 · Skill 7
Doubling the angle on the bow
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Steering 058°T at 4.4 kn, at 1000 you see Tern Island tower 40° on the port bow. At 1018 it is 80° on the port bow.
How far off the object are you at 1018? 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 1018: ________ nm Distance off when abeam: ________ nm
Steering 282°T at 6.7 kn, at 1315 you see Tern Island tower 40° on the port bow. At 1330 it is 80° on the port bow.
How far off the object are you at 1330? 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 1330: ________ nm Distance off when abeam: ________ nm
Steering 247°T at 5.7 kn, at 1645 you see Heron Point Light 20° on the port bow. At 1657 it is 40° on the port bow.
How far off the object are you at 1657? 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 1657: ________ nm Distance off when abeam: ________ nm
Steering 156°T at 10.1 kn, at 1100 you see Heron Point Light 25° on the starboard bow. At 1115 it is 50° on the starboard bow.
How far off the object are you at 1115? 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 1115: ________ nm Distance off when abeam: ________ nm
Steering 150°T at 7.0 kn, at 0845 you see Westfield church spire 35° on the starboard bow. At 0903 it is 70° on the starboard bow.
How far off the object are you at 0903? 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 0903: ________ nm Distance off when abeam: ________ nm
Steering 189°T at 6.0 kn, at 1225 you see Gannet Rock daybeacon 30° on the starboard bow. At 1249 it is 60° on the starboard bow.
How far off the object are you at 1249? 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 1249: ________ nm Distance off when abeam: ________ nm
Steering 329°T at 5.0 kn, at 1355 you see Gannet Rock daybeacon 30° on the port bow. At 1414 it is 60° on the port bow.
How far off the object are you at 1414? 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 1414: ________ nm Distance off when abeam: ________ nm
Steering 090°T at 6.8 kn, at 0715 you see Kittle water tank 25° on the starboard bow. At 0729 it is 50° on the starboard bow.
How far off the object are you at 0729? 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 0729: ________ nm Distance off when abeam: ________ nm
Practice Sheet No. 1
Answer key
| No. | Answers | Problem |
|---|---|---|
| 1 | Distance off at 1018: 1.32 nm Distance off when abeam: 1.30 nm | No. 6001 (worked solution) |
| 2 | Distance off at 1330: 1.68 nm Distance off when abeam: 1.65 nm | No. 6002 (worked solution) |
| 3 | Distance off at 1657: 1.14 nm Distance off when abeam: 0.73 nm | No. 6003 (worked solution) |
| 4 | Distance off at 1115: 2.53 nm Distance off when abeam: 1.93 nm | No. 6004 (worked solution) |
| 5 | Distance off at 0903: 2.10 nm Distance off when abeam: 1.97 nm | No. 6005 (worked solution) |
| 6 | Distance off at 1249: 2.40 nm Distance off when abeam: 2.08 nm | No. 6006 (worked solution) |
| 7 | Distance off at 1414: 1.58 nm Distance off when abeam: 1.37 nm | No. 6007 (worked solution) |
| 8 | Distance off at 0729: 1.59 nm Distance off when abeam: 1.22 nm | No. 6008 (worked solution) |