Worksheet 19 · Skill 7
Doubling the angle on the bow
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Steering 138°T at 5.7 kn, at 1645 you see Gannet Rock daybeacon 40° on the port bow. At 1705 it is 80° on the port bow.
How far off the object are you at 1705? 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 1705: ________ nm Distance off when abeam: ________ nm
Steering 219°T at 4.8 kn, at 1430 you see Mill stack 20° on the port bow. At 1459 it is 40° on the port bow.
How far off the object are you at 1459? 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 1459: ________ nm Distance off when abeam: ________ nm
Steering 093°T at 9.6 kn, at 1120 you see Kittle water tank 20° on the starboard bow. At 1137 it is 40° on the starboard bow.
How far off the object are you at 1137? 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 1137: ________ nm Distance off when abeam: ________ nm
Steering 221°T at 8.7 kn, at 1700 you see Mill stack 20° on the port bow. At 1719 it is 40° on the port bow.
How far off the object are you at 1719? 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 1719: ________ nm Distance off when abeam: ________ nm
Steering 179°T at 4.1 kn, at 1330 you see Gannet Rock daybeacon 25° on the starboard bow. At 1342 it is 50° on the starboard bow.
How far off the object are you at 1342? 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 1342: ________ nm Distance off when abeam: ________ nm
Steering 282°T at 9.4 kn, at 1050 you see Gannet Rock daybeacon 30° on the starboard bow. At 1102 it is 60° on the starboard bow.
How far off the object are you at 1102? 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 1102: ________ nm Distance off when abeam: ________ nm
Steering 010°T at 11.6 kn, at 1705 you see Gannet Rock daybeacon 20° on the starboard bow. At 1710 it is 40° on the starboard bow.
How far off the object are you at 1710? 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 1710: ________ nm Distance off when abeam: ________ nm
Steering 276°T at 11.8 kn, at 1405 you see Gannet Rock daybeacon 30° on the starboard bow. At 1413 it is 60° 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
Practice Sheet No. 1
Answer key
| No. | Answers | Problem |
|---|---|---|
| 1 | Distance off at 1705: 1.90 nm Distance off when abeam: 1.87 nm | No. 19001 (worked solution) |
| 2 | Distance off at 1459: 2.32 nm Distance off when abeam: 1.49 nm | No. 19002 (worked solution) |
| 3 | Distance off at 1137: 2.72 nm Distance off when abeam: 1.75 nm | No. 19003 (worked solution) |
| 4 | Distance off at 1719: 2.76 nm Distance off when abeam: 1.77 nm | No. 19004 (worked solution) |
| 5 | Distance off at 1342: 0.82 nm Distance off when abeam: 0.63 nm | No. 19005 (worked solution) |
| 6 | Distance off at 1102: 1.88 nm Distance off when abeam: 1.63 nm | No. 19006 (worked solution) |
| 7 | Distance off at 1710: 0.97 nm Distance off when abeam: 0.62 nm | No. 19007 (worked solution) |
| 8 | Distance off at 1413: 1.57 nm Distance off when abeam: 1.36 nm | No. 19008 (worked solution) |