Worksheet 26 · Skill 7
Doubling the angle on the bow
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Steering 266°T at 6.1 kn, at 1515 you see Westfield church spire 30° on the port bow. At 1528 it is 60° on the port bow.
How far off the object are you at 1528? 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 1528: ________ nm Distance off when abeam: ________ nm
Steering 117°T at 10.5 kn, at 1440 you see Kittle water tank 25° on the starboard bow. At 1449 it is 50° on the starboard bow.
How far off the object are you at 1449? 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 1449: ________ nm Distance off when abeam: ________ nm
Steering 145°T at 5.4 kn, at 1200 you see Heron Point Light 40° on the starboard bow. At 1207 it is 80° on the starboard bow.
How far off the object are you at 1207? 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 1207: ________ nm Distance off when abeam: ________ nm
Steering 121°T at 9.7 kn, at 1445 you see Heron Point Light 25° on the starboard bow. At 1450 it is 50° on the starboard bow.
How far off the object are you at 1450? 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 1450: ________ nm Distance off when abeam: ________ nm
Steering 296°T at 4.6 kn, at 1730 you see Westfield church spire 30° on the port bow. At 1754 it is 60° on the port bow.
How far off the object are you at 1754? 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 1754: ________ nm Distance off when abeam: ________ nm
Steering 337°T at 5.2 kn, at 1730 you see Gannet Rock daybeacon 30° on the port bow. At 1756 it is 60° on the port bow.
How far off the object are you at 1756? 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 1756: ________ nm Distance off when abeam: ________ nm
Steering 020°T at 8.3 kn, at 0945 you see Tern Island tower 35° on the port bow. At 0956 it is 70° on the port bow.
How far off the object are you at 0956? 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 0956: ________ nm Distance off when abeam: ________ nm
Steering 139°T at 7.8 kn, at 1620 you see Gannet Rock daybeacon 30° on the port bow. At 1639 it is 60° on the port bow.
How far off the object are you at 1639? 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 1639: ________ nm Distance off when abeam: ________ nm
Practice Sheet No. 1
Answer key
| No. | Answers | Problem |
|---|---|---|
| 1 | Distance off at 1528: 1.32 nm Distance off when abeam: 1.14 nm | No. 26001 (worked solution) |
| 2 | Distance off at 1449: 1.58 nm Distance off when abeam: 1.21 nm | No. 26002 (worked solution) |
| 3 | Distance off at 1207: 0.63 nm Distance off when abeam: 0.62 nm | No. 26003 (worked solution) |
| 4 | Distance off at 1450: 0.81 nm Distance off when abeam: 0.62 nm | No. 26004 (worked solution) |
| 5 | Distance off at 1754: 1.84 nm Distance off when abeam: 1.59 nm | No. 26005 (worked solution) |
| 6 | Distance off at 1756: 2.25 nm Distance off when abeam: 1.95 nm | No. 26006 (worked solution) |
| 7 | Distance off at 0956: 1.52 nm Distance off when abeam: 1.43 nm | No. 26007 (worked solution) |
| 8 | Distance off at 1639: 2.47 nm Distance off when abeam: 2.14 nm | No. 26008 (worked solution) |