Worksheet 21 · Skill 7
Doubling the angle on the bow
Plot Pass worksheet. Plot Pass $1.95/month or $19.50/year · Free during preview. Plotroom · cedarpointmarina.net · invented chart, not for navigation.
Steering 057°T at 7.7 kn, at 1000 you see Tern Island tower 35° on the starboard bow. At 1025 it is 70° on the starboard bow.
How far off the object are you at 1025? 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 1025: ________ nm Distance off when abeam: ________ nm
Steering 070°T at 4.8 kn, at 1105 you see Gannet Rock daybeacon 40° on the starboard bow. At 1127 it is 80° on the starboard bow.
How far off the object are you at 1127? 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 1127: ________ nm Distance off when abeam: ________ nm
Steering 239°T at 8.9 kn, at 0955 you see Kittle water tank 40° on the port bow. At 1003 it is 80° on the port bow.
How far off the object are you at 1003? 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 1003: ________ nm Distance off when abeam: ________ nm
Steering 179°T at 12.0 kn, at 1010 you see Heron Point Light 40° on the starboard bow. At 1023 it is 80° on the starboard bow.
How far off the object are you at 1023? 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 1023: ________ nm Distance off when abeam: ________ nm
Steering 221°T at 7.3 kn, at 0820 you see Tern Island tower 40° on the port bow. At 0831 it is 80° on the port bow.
How far off the object are you at 0831? 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 0831: ________ nm Distance off when abeam: ________ nm
Steering 198°T at 9.5 kn, at 1240 you see Heron Point Light 35° on the starboard bow. At 1253 it is 70° on the starboard bow.
How far off the object are you at 1253? 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 1253: ________ nm Distance off when abeam: ________ nm
Steering 133°T at 4.5 kn, at 1425 you see Gannet Rock daybeacon 20° on the port bow. At 1436 it is 40° on the port bow.
How far off the object are you at 1436? 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 1436: ________ nm Distance off when abeam: ________ nm
Steering 351°T at 6.3 kn, at 1325 you see Tern Island tower 25° on the starboard bow. At 1350 it is 50° on the starboard bow.
How far off the object are you at 1350? 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 1350: ________ nm Distance off when abeam: ________ nm
Practice Sheet No. 1
Answer key
| No. | Answers | Problem |
|---|---|---|
| 1 | Distance off at 1025: 3.21 nm Distance off when abeam: 3.01 nm | No. 21001 (worked solution) |
| 2 | Distance off at 1127: 1.76 nm Distance off when abeam: 1.73 nm | No. 21002 (worked solution) |
| 3 | Distance off at 1003: 1.19 nm Distance off when abeam: 1.17 nm | No. 21003 (worked solution) |
| 4 | Distance off at 1023: 2.60 nm Distance off when abeam: 2.56 nm | No. 21004 (worked solution) |
| 5 | Distance off at 0831: 1.34 nm Distance off when abeam: 1.32 nm | No. 21005 (worked solution) |
| 6 | Distance off at 1253: 2.06 nm Distance off when abeam: 1.93 nm | No. 21006 (worked solution) |
| 7 | Distance off at 1436: 0.83 nm Distance off when abeam: 0.53 nm | No. 21007 (worked solution) |
| 8 | Distance off at 1350: 2.63 nm Distance off when abeam: 2.01 nm | No. 21008 (worked solution) |