Worksheet 13 · Skill 7
Doubling the angle on the bow
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Steering 272°T at 4.0 kn, at 1335 you see Kittle water tank 35° on the port bow. At 1348 it is 70° on the port bow.
How far off the object are you at 1348? 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 1348: ________ nm Distance off when abeam: ________ nm
Steering 258°T at 6.7 kn, at 1645 you see Mill stack 20° on the port bow. At 1704 it is 40° on the port bow.
How far off the object are you at 1704? 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 1704: ________ nm Distance off when abeam: ________ nm
Steering 212°T at 6.2 kn, at 1655 you see Tern Island tower 35° on the starboard bow. At 1716 it is 70° on the starboard bow.
How far off the object are you at 1716? 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 1716: ________ nm Distance off when abeam: ________ nm
Steering 053°T at 4.6 kn, at 1030 you see Tern Island tower 35° on the port bow. At 1056 it is 70° on the port bow.
How far off the object are you at 1056? 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 1056: ________ nm Distance off when abeam: ________ nm
Steering 144°T at 11.9 kn, at 0720 you see Heron Point Light 20° on the starboard bow. At 0728 it is 40° on the starboard bow.
How far off the object are you at 0728? 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 0728: ________ nm Distance off when abeam: ________ nm
Steering 235°T at 5.3 kn, at 0725 you see Kittle water tank 40° on the port bow. At 0737 it is 80° on the port bow.
How far off the object are you at 0737? 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 0737: ________ nm Distance off when abeam: ________ nm
Steering 123°T at 6.8 kn, at 1650 you see Gannet Rock daybeacon 35° on the port bow. At 1716 it is 70° on the port bow.
How far off the object are you at 1716? 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 1716: ________ nm Distance off when abeam: ________ nm
Steering 340°T at 6.5 kn, at 1125 you see Gannet Rock daybeacon 35° on the port bow. At 1132 it is 70° on the port bow.
How far off the object are you at 1132? 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 1132: ________ nm Distance off when abeam: ________ nm
Practice Sheet No. 1
Answer key
| No. | Answers | Problem |
|---|---|---|
| 1 | Distance off at 1348: 0.87 nm Distance off when abeam: 0.81 nm | No. 13001 (worked solution) |
| 2 | Distance off at 1704: 2.12 nm Distance off when abeam: 1.36 nm | No. 13002 (worked solution) |
| 3 | Distance off at 1716: 2.17 nm Distance off when abeam: 2.04 nm | No. 13003 (worked solution) |
| 4 | Distance off at 1056: 1.99 nm Distance off when abeam: 1.87 nm | No. 13004 (worked solution) |
| 5 | Distance off at 0728: 1.59 nm Distance off when abeam: 1.02 nm | No. 13005 (worked solution) |
| 6 | Distance off at 0737: 1.06 nm Distance off when abeam: 1.04 nm | No. 13006 (worked solution) |
| 7 | Distance off at 1716: 2.95 nm Distance off when abeam: 2.77 nm | No. 13007 (worked solution) |
| 8 | Distance off at 1132: 0.76 nm Distance off when abeam: 0.71 nm | No. 13008 (worked solution) |