Worksheet 24 · Skill 7
Doubling the angle on the bow
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Steering 208°T at 7.0 kn, at 1440 you see Tern Island tower 35° on the port bow. At 1453 it is 70° on the port bow.
How far off the object are you at 1453? 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 1453: ________ nm Distance off when abeam: ________ nm
Steering 235°T at 6.0 kn, at 1445 you see Mill stack 25° on the port bow. At 1508 it is 50° on the port bow.
How far off the object are you at 1508? 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 1508: ________ nm Distance off when abeam: ________ nm
Steering 201°T at 10.9 kn, at 1700 you see Tern Island tower 35° on the port bow. At 1709 it is 70° on the port bow.
How far off the object are you at 1709? 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 1709: ________ nm Distance off when abeam: ________ nm
Steering 128°T at 5.3 kn, at 1215 you see Mill stack 30° on the starboard bow. At 1234 it is 60° on the starboard bow.
How far off the object are you at 1234? 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 1234: ________ nm Distance off when abeam: ________ nm
Steering 082°T at 10.4 kn, at 1330 you see Tern Island tower 20° on the port bow. At 1345 it is 40° on the port bow.
How far off the object are you at 1345? 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 1345: ________ nm Distance off when abeam: ________ nm
Steering 227°T at 5.1 kn, at 0925 you see Kittle water tank 40° on the port bow. At 0948 it is 80° on the port bow.
How far off the object are you at 0948? 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 0948: ________ nm Distance off when abeam: ________ nm
Steering 316°T at 7.4 kn, at 1400 you see Tern Island tower 35° on the starboard bow. At 1413 it is 70° on the starboard bow.
How far off the object are you at 1413? 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 1413: ________ nm Distance off when abeam: ________ nm
Steering 002°T at 5.3 kn, at 0850 you see Westfield church spire 40° on the port bow. At 0909 it is 80° on the port bow.
How far off the object are you at 0909? 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 0909: ________ nm Distance off when abeam: ________ nm
Practice Sheet No. 1
Answer key
| No. | Answers | Problem |
|---|---|---|
| 1 | Distance off at 1453: 1.52 nm Distance off when abeam: 1.43 nm | No. 24001 (worked solution) |
| 2 | Distance off at 1508: 2.30 nm Distance off when abeam: 1.76 nm | No. 24002 (worked solution) |
| 3 | Distance off at 1709: 1.64 nm Distance off when abeam: 1.54 nm | No. 24003 (worked solution) |
| 4 | Distance off at 1234: 1.68 nm Distance off when abeam: 1.45 nm | No. 24004 (worked solution) |
| 5 | Distance off at 1345: 2.60 nm Distance off when abeam: 1.67 nm | No. 24005 (worked solution) |
| 6 | Distance off at 0948: 1.96 nm Distance off when abeam: 1.93 nm | No. 24006 (worked solution) |
| 7 | Distance off at 1413: 1.60 nm Distance off when abeam: 1.51 nm | No. 24007 (worked solution) |
| 8 | Distance off at 0909: 1.68 nm Distance off when abeam: 1.65 nm | No. 24008 (worked solution) |