Worksheet 51 · 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 1520 your fix is 019°T, 1.8 nm from Westfield church spire. You steer 119°T at 6.1 kn through the water. At 1550 a new fix puts you 085°T, 2.9 nm from Westfield church spire.

   Plot the 1550 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 0810 your fix is 007°T, 1.3 nm from Tern Island tower. You steer 086°T at 6.9 kn through the water. At 0845 a new fix puts you 037°T, 4.3 nm from Gannet Rock daybeacon.

   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 35 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

3. At 1150 your fix is 301°T, 4.6 nm from Tern Island tower. You steer 176°T at 7.4 kn through the water. At 1230 a new fix puts you 070°T, 2.8 nm from Heron Point Light.

   Plot the 1230 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  

4. At 0730 your fix is 056°T, 3.9 nm from Westfield church spire. You steer 165°T at 8.7 kn through the water. At 0805 a new fix puts you 061°T, 2.5 nm from Heron Point Light.

   Plot the 0805 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  

5. At 1155 your fix is 149°T, 1.0 nm from Gannet Rock daybeacon. You steer 279°T at 7.1 kn through the water. At 1250 a new fix puts you 071°T, 1.3 nm from Heron Point Light.

   Plot the 1250 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  

6. At 1200 your fix is 301°T, 4.5 nm from Tern Island tower. You steer 166°T at 4.0 kn through the water. At 1235 a new fix puts you 294°T, 2.8 nm from Tern Island tower.

   Plot the 1235 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 1130 your fix is 070°T, 2.7 nm from Heron Point Light. You steer 016°T at 5.8 kn through the water. At 1225 a new fix puts you 339°T, 2.6 nm from Tern Island tower.

   Plot the 1225 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 1035 your fix is 197°T, 1.9 nm from Tern Island tower. You steer 286°T at 4.4 kn through the water. At 1110 a new fix puts you 260°T, 2.0 nm from Tern Island tower.

   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 35 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn