Worksheet 920 · 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 1335 your fix is 018°T, 1.5 nm from Tern Island tower. You steer 273°T at 4.4 kn through the water. At 1425 a new fix puts you 041°T, 4.3 nm from Westfield church spire.

   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  

2. At 0925 your fix is 110°T, 1.8 nm from Gannet Rock daybeacon. You steer 269°T at 8.1 kn through the water. At 1025 a new fix puts you 354°T, 1.5 nm from Heron Point Light.

   Plot the 1025 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 1010 your fix is 073°T, 2.4 nm from Westfield church spire. You steer 138°T at 8.4 kn through the water. At 1045 a new fix puts you 352°T, 2.0 nm from Mill stack.

   Plot the 1045 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 0925 your fix is 058°T, 3.0 nm from Tern Island tower. You steer 270°T at 6.4 kn through the water. At 1015 a new fix puts you 294°T, 3.7 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 50 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

5. At 0845 your fix is 060°T, 1.6 nm from Kittle water tank. You steer 337°T at 8.7 kn through the water. At 0925 a new fix puts you 067°T, 3.4 nm from Tern Island tower.

   Plot the 0925 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 0815 your fix is 079°T, 1.3 nm from Westfield church spire. You steer 132°T at 7.8 kn through the water. At 0845 a new fix puts you 341°T, 2.6 nm from Mill stack.

   Plot the 0845 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  

7. At 1040 your fix is 203°T, 2.6 nm from Tern Island tower. You steer 101°T at 5.9 kn through the water. At 1115 a new fix puts you 045°T, 0.9 nm from Gannet Rock daybeacon.

   Plot the 1115 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  

8. At 0840 your fix is 096°T, 1.9 nm from Tern Island tower. You steer 144°T at 6.4 kn through the water. At 0925 a new fix puts you 057°T, 2.1 nm from Kittle water tank.

   Plot the 0925 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