Worksheet 14 · Skill 7
Doubling the angle on the bow
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Steering 210°T at 8.7 kn, at 1430 you see Kittle water tank 30° on the port bow. At 1447 it is 60° on the port bow.
How far off the object are you at 1447? 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 1447: ________ nm Distance off when abeam: ________ nm
Steering 090°T at 10.6 kn, at 1800 you see Tern Island tower 30° on the port bow. At 1813 it is 60° on the port bow.
How far off the object are you at 1813? 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 1813: ________ nm Distance off when abeam: ________ nm
Steering 282°T at 6.6 kn, at 0910 you see Mill stack 30° on the port bow. At 0936 it is 60° on the port bow.
How far off the object are you at 0936? 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 0936: ________ nm Distance off when abeam: ________ nm
Steering 293°T at 7.6 kn, at 1620 you see Gannet Rock daybeacon 20° on the starboard bow. At 1634 it is 40° on the starboard bow.
How far off the object are you at 1634? 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 1634: ________ nm Distance off when abeam: ________ nm
Steering 124°T at 4.5 kn, at 1105 you see Mill stack 25° on the starboard bow. At 1133 it is 50° on the starboard bow.
How far off the object are you at 1133? 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 1133: ________ nm Distance off when abeam: ________ nm
Steering 338°T at 7.3 kn, at 1045 you see Westfield church spire 30° on the port bow. At 1111 it is 60° on the port bow.
How far off the object are you at 1111? 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 1111: ________ nm Distance off when abeam: ________ nm
Steering 280°T at 6.3 kn, at 1750 you see Westfield church spire 20° on the port bow. At 1812 it is 40° on the port bow.
How far off the object are you at 1812? 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 1812: ________ nm Distance off when abeam: ________ nm
Steering 072°T at 5.8 kn, at 0830 you see Tern Island tower 25° on the port bow. At 0852 it is 50° on the port bow.
How far off the object are you at 0852? 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 0852: ________ nm Distance off when abeam: ________ nm
Practice Sheet No. 1
Answer key
| No. | Answers | Problem |
|---|---|---|
| 1 | Distance off at 1447: 2.47 nm Distance off when abeam: 2.13 nm | No. 14001 (worked solution) |
| 2 | Distance off at 1813: 2.30 nm Distance off when abeam: 1.99 nm | No. 14002 (worked solution) |
| 3 | Distance off at 0936: 2.86 nm Distance off when abeam: 2.48 nm | No. 14003 (worked solution) |
| 4 | Distance off at 1634: 1.77 nm Distance off when abeam: 1.14 nm | No. 14004 (worked solution) |
| 5 | Distance off at 1133: 2.10 nm Distance off when abeam: 1.61 nm | No. 14005 (worked solution) |
| 6 | Distance off at 1111: 3.16 nm Distance off when abeam: 2.74 nm | No. 14006 (worked solution) |
| 7 | Distance off at 1812: 2.31 nm Distance off when abeam: 1.48 nm | No. 14007 (worked solution) |
| 8 | Distance off at 0852: 2.13 nm Distance off when abeam: 1.63 nm | No. 14008 (worked solution) |