Worksheet 22 · Skill 7
Doubling the angle on the bow
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Steering 033°T at 4.4 kn, at 1555 you see Tern Island tower 40° on the starboard bow. At 1622 it is 80° on the starboard bow.
How far off the object are you at 1622? 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 1622: ________ nm Distance off when abeam: ________ nm
Steering 268°T at 10.7 kn, at 1315 you see Gannet Rock daybeacon 35° on the starboard bow. At 1323 it is 70° on the starboard bow.
How far off the object are you at 1323? 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 1323: ________ nm Distance off when abeam: ________ nm
Steering 124°T at 10.5 kn, at 1020 you see Gannet Rock daybeacon 25° on the port bow. At 1039 it is 50° on the port bow.
How far off the object are you at 1039? 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 1039: ________ nm Distance off when abeam: ________ nm
Steering 088°T at 4.6 kn, at 1325 you see Kittle water tank 30° on the starboard bow. At 1337 it is 60° on the starboard bow.
How far off the object are you at 1337? 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 1337: ________ nm Distance off when abeam: ________ nm
Steering 059°T at 11.2 kn, at 0725 you see Tern Island tower 30° on the port bow. At 0738 it is 60° on the port bow.
How far off the object are you at 0738? 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 0738: ________ nm Distance off when abeam: ________ nm
Steering 127°T at 8.1 kn, at 1520 you see Heron Point Light 40° on the starboard bow. At 1544 it is 80° on the starboard bow.
How far off the object are you at 1544? 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 1544: ________ nm Distance off when abeam: ________ nm
Steering 235°T at 7.9 kn, at 1735 you see Tern Island tower 25° on the port bow. At 1746 it is 50° on the port bow.
How far off the object are you at 1746? 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 1746: ________ nm Distance off when abeam: ________ nm
Steering 333°T at 10.9 kn, at 1105 you see Westfield church spire 25° on the port bow. At 1116 it is 50° on the port bow.
How far off the object are you at 1116? 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 1116: ________ nm Distance off when abeam: ________ nm
Practice Sheet No. 1
Answer key
| No. | Answers | Problem |
|---|---|---|
| 1 | Distance off at 1622: 1.98 nm Distance off when abeam: 1.95 nm | No. 22001 (worked solution) |
| 2 | Distance off at 1323: 1.43 nm Distance off when abeam: 1.34 nm | No. 22002 (worked solution) |
| 3 | Distance off at 1039: 3.33 nm Distance off when abeam: 2.55 nm | No. 22003 (worked solution) |
| 4 | Distance off at 1337: 0.92 nm Distance off when abeam: 0.80 nm | No. 22004 (worked solution) |
| 5 | Distance off at 0738: 2.43 nm Distance off when abeam: 2.10 nm | No. 22005 (worked solution) |
| 6 | Distance off at 1544: 3.24 nm Distance off when abeam: 3.19 nm | No. 22006 (worked solution) |
| 7 | Distance off at 1746: 1.45 nm Distance off when abeam: 1.11 nm | No. 22007 (worked solution) |
| 8 | Distance off at 1116: 2.00 nm Distance off when abeam: 1.53 nm | No. 22008 (worked solution) |