Worksheet 720 · 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 1200 your fix is 061°T, 1.9 nm from Westfield church spire. You steer 123°T at 7.7 kn through the water. At 1240 a new fix puts you 212°T, 3.1 nm from Tern Island tower.

   Plot the 1240 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  

2. At 1005 your fix is 044°T, 3.4 nm from Tern Island tower. You steer 153°T at 4.1 kn through the water. At 1040 a new fix puts you 074°T, 3.5 nm from Tern Island tower.

   Plot the 1040 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  

3. At 0735 your fix is 323°T, 1.6 nm from Tern Island tower. You steer 088°T at 5.1 kn through the water. At 0825 a new fix puts you 036°T, 3.0 nm from Tern Island tower.

   Plot the 0825 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  

4. At 1300 your fix is 109°T, 2.2 nm from Gannet Rock daybeacon. You steer 357°T at 6.9 kn through the water. At 1345 a new fix puts you 069°T, 3.6 nm from Tern Island tower.

   Plot the 1345 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  

5. At 0820 your fix is 030°T, 1.4 nm from Kittle water tank. You steer 267°T at 5.9 kn through the water. At 0900 a new fix puts you 218°T, 1.6 nm from Gannet Rock daybeacon.

   Plot the 0900 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 1255 your fix is 221°T, 2.0 nm from Gannet Rock daybeacon. You steer 302°T at 4.8 kn through the water. At 1400 a new fix puts you 245°T, 3.1 nm from Tern Island tower.

   Plot the 1400 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  

7. At 0905 your fix is 019°T, 3.8 nm from Westfield church spire. You steer 098°T at 7.5 kn through the water. At 1000 a new fix puts you 342°T, 1.9 nm from Tern Island tower.

   Plot the 1000 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 55 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

8. At 1225 your fix is 056°T, 0.9 nm from Heron Point Light. You steer 007°T at 5.9 kn through the water. At 1330 a new fix puts you 294°T, 3.4 nm from Tern Island tower.

   Plot the 1330 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