Worksheet 666 · 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 0735 your fix is 272°T, 3.2 nm from Tern Island tower. You steer 177°T at 6.4 kn through the water. At 0810 a new fix puts you 340°T, 2.6 nm from Mill stack.

   Plot the 0810 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 1050 your fix is 334°T, 2.1 nm from Tern Island tower. You steer 235°T at 6.7 kn through the water. At 1120 a new fix puts you 072°T, 3.0 nm from Westfield church spire.

   Plot the 1120 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 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

3. At 0700 your fix is 021°T, 1.9 nm from Tern Island tower. You steer 139°T at 4.1 kn through the water. At 0815 a new fix puts you 071°T, 2.8 nm from Gannet Rock daybeacon.

   Plot the 0815 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 75 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

4. At 0840 your fix is 112°T, 1.6 nm from Gannet Rock daybeacon. You steer 260°T at 4.3 kn through the water. At 0910 a new fix puts you 253°T, 1.8 nm from Gannet Rock daybeacon.

   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 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

5. At 1100 your fix is 323°T, 2.2 nm from Mill stack. You steer 017°T at 4.4 kn through the water. At 1205 a new fix puts you 264°T, 3.1 nm from Tern Island tower.

   Plot the 1205 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  

6. At 1050 your fix is 336°T, 1.9 nm from Heron Point Light. You steer 092°T at 7.1 kn through the water. At 1150 a new fix puts you 205°T, 2.1 nm from Gannet Rock daybeacon.

   Plot the 1150 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  

7. At 0735 your fix is 302°T, 4.5 nm from Tern Island tower. You steer 141°T at 4.3 kn through the water. At 0900 a new fix puts you 225°T, 3.4 nm from Tern Island tower.

   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 85 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

8. At 1335 your fix is 014°T, 1.3 nm from Westfield church spire. You steer 138°T at 8.9 kn through the water. At 1425 a new fix puts you 003°T, 1.2 nm from Mill stack.

   Plot the 1425 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