Worksheet 606 · 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 1055 your fix is 030°T, 1.4 nm from Tern Island tower. You steer 092°T at 4.9 kn through the water. At 1125 a new fix puts you 072°T, 2.3 nm from Tern Island tower.

   Plot the 1125 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  

2. At 0900 your fix is 095°T, 1.5 nm from Gannet Rock daybeacon. You steer 012°T at 8.4 kn through the water. At 0930 a new fix puts you 068°T, 5.1 nm from Tern Island tower.

   Plot the 0930 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 1005 your fix is 036°T, 4.0 nm from Westfield church spire. You steer 136°T at 6.9 kn through the water. At 1040 a new fix puts you 273°T, 2.2 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  

4. At 1020 your fix is 041°T, 2.7 nm from Westfield church spire. You steer 145°T at 9.0 kn through the water. At 1100 a new fix puts you 019°T, 2.7 nm from Mill stack.

   Plot the 1100 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  

5. At 0910 your fix is 237°T, 2.5 nm from Tern Island tower. You steer 138°T at 4.5 kn through the water. At 0940 a new fix puts you 011°T, 2.9 nm from Mill stack.

   Plot the 0940 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  

6. At 1055 your fix is 308°T, 2.7 nm from Tern Island tower. You steer 181°T at 4.0 kn through the water. At 1130 a new fix puts you 225°T, 2.8 nm from Tern Island tower.

   Plot the 1130 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  

7. At 1255 your fix is 084°T, 3.1 nm from Westfield church spire. You steer 136°T at 7.2 kn through the water. At 1335 a new fix puts you 002°T, 2.4 nm from Mill stack.

   Plot the 1335 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  

8. At 0950 your fix is 067°T, 5.0 nm from Tern Island tower. You steer 217°T at 4.4 kn through the water. At 1110 a new fix puts you 253°T, 1.4 nm from Gannet Rock daybeacon.

   Plot the 1110 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 80 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn