Worksheet 84 · Skill 5

Set and drift

Print this worksheet Next sheet

Plot Pass worksheet. Plot Pass $1.95/month or $19.50/year · Free during preview. Plotroom · cedarpointmarina.net · invented chart, not for navigation.

1. At 1345 your fix is 075°T, 2.2 nm from Tern Island tower. You steer 303°T at 5.7 kn through the water. At 1420 a new fix puts you 357°T, 2.5 nm from Tern Island tower.

   Plot the 1420 DR, then find the current: set (the true direction the water moved you, from the DR to the fix) and drift (its speed in knots over the 35 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

2. At 0810 your fix is 071°T, 2.7 nm from Heron Point Light. You steer 335°T at 5.3 kn through the water. At 0910 a new fix puts you 037°T, 2.2 nm from Westfield church spire.

   Plot the 0910 DR, then find the current: set (the true direction the water moved you, from the DR to the fix) and drift (its speed in knots over the 60 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

3. At 1235 your fix is 240°T, 1.4 nm from Gannet Rock daybeacon. You steer 293°T at 5.1 kn through the water. At 1320 a new fix puts you 016°T, 2.7 nm from Heron Point Light.

   Plot the 1320 DR, then find the current: set (the true direction the water moved you, from the DR to the fix) and drift (its speed in knots over the 45 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

4. At 0850 your fix is 035°T, 3.6 nm from Gannet Rock daybeacon. You steer 244°T at 5.6 kn through the water. At 0950 a new fix puts you 219°T, 3.1 nm from Tern Island tower.

   Plot the 0950 DR, then find the current: set (the true direction the water moved you, from the DR to the fix) and drift (its speed in knots over the 60 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

5. At 0905 your fix is 099°T, 1.7 nm from Gannet Rock daybeacon. You steer 003°T at 4.1 kn through the water. At 0945 a new fix puts you 045°T, 3.3 nm from Gannet Rock daybeacon.

   Plot the 0945 DR, then find the current: set (the true direction the water moved you, from the DR to the fix) and drift (its speed in knots over the 40 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

6. At 1420 your fix is 057°T, 3.3 nm from Tern Island tower. You steer 173°T at 6.8 kn through the water. At 1500 a new fix puts you 077°T, 2.1 nm from Gannet Rock daybeacon.

   Plot the 1500 DR, then find the current: set (the true direction the water moved you, from the DR to the fix) and drift (its speed in knots over the 40 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

7. At 0910 your fix is 014°T, 3.4 nm from Westfield church spire. You steer 125°T at 4.9 kn through the water. At 1015 a new fix puts you 269°T, 1.6 nm from Tern Island tower.

   Plot the 1015 DR, then find the current: set (the true direction the water moved you, from the DR to the fix) and drift (its speed in knots over the 65 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

8. At 1320 your fix is 326°T, 2.9 nm from Tern Island tower. You steer 260°T at 4.1 kn through the water. At 1410 a new fix puts you 040°T, 4.5 nm from Westfield church spire.

   Plot the 1410 DR, then find the current: set (the true direction the water moved you, from the DR to the fix) and drift (its speed in knots over the 50 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn