Worksheet 8 · Skill 7
Doubling the angle on the bow
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Steering 161°T at 4.5 kn, at 1655 you see Gannet Rock daybeacon 25° on the port bow. At 1704 it is 50° 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 148°T at 4.6 kn, at 1235 you see Gannet Rock daybeacon 35° on the starboard bow. At 1246 it is 70° on the starboard bow.
How far off the object are you at 1246? 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 1246: ________ nm Distance off when abeam: ________ nm
Steering 032°T at 7.0 kn, at 1435 you see Tern Island tower 25° on the starboard bow. At 1457 it is 50° on the starboard bow.
How far off the object are you at 1457? 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 1457: ________ nm Distance off when abeam: ________ nm
Steering 265°T at 8.9 kn, at 0700 you see Mill stack 20° on the port bow. At 0710 it is 40° on the port bow.
How far off the object are you at 0710? 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 0710: ________ nm Distance off when abeam: ________ nm
Steering 231°T at 4.5 kn, at 1635 you see Westfield church spire 40° on the starboard bow. At 1700 it is 80° on the starboard bow.
How far off the object are you at 1700? 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 1700: ________ nm Distance off when abeam: ________ nm
Steering 226°T at 7.3 kn, at 1315 you see Kittle water tank 25° on the port bow. At 1335 it is 50° on the port bow.
How far off the object are you at 1335? 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 1335: ________ nm Distance off when abeam: ________ nm
Steering 076°T at 5.7 kn, at 1625 you see Kittle water tank 40° on the starboard bow. At 1654 it is 80° on the starboard bow.
How far off the object are you at 1654? 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 1654: ________ nm Distance off when abeam: ________ nm
Steering 174°T at 4.4 kn, at 1235 you see Westfield church spire 25° on the starboard bow. At 1250 it is 50° on the starboard bow.
How far off the object are you at 1250? 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 1250: ________ nm Distance off when abeam: ________ nm
Practice Sheet No. 1
Answer key
| No. | Answers | Problem |
|---|---|---|
| 1 | Distance off at 1704: 0.68 nm Distance off when abeam: 0.52 nm | No. 8001 (worked solution) |
| 2 | Distance off at 1246: 0.84 nm Distance off when abeam: 0.79 nm | No. 8002 (worked solution) |
| 3 | Distance off at 1457: 2.57 nm Distance off when abeam: 1.97 nm | No. 8003 (worked solution) |
| 4 | Distance off at 0710: 1.48 nm Distance off when abeam: 0.95 nm | No. 8004 (worked solution) |
| 5 | Distance off at 1700: 1.88 nm Distance off when abeam: 1.85 nm | No. 8005 (worked solution) |
| 6 | Distance off at 1335: 2.43 nm Distance off when abeam: 1.86 nm | No. 8006 (worked solution) |
| 7 | Distance off at 1654: 2.76 nm Distance off when abeam: 2.71 nm | No. 8007 (worked solution) |
| 8 | Distance off at 1250: 1.10 nm Distance off when abeam: 0.84 nm | No. 8008 (worked solution) |