Worksheet 139 · 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 1100 your fix is 092°T, 2.1 nm from Gannet Rock daybeacon. You steer 251°T at 4.4 kn through the water. At 1225 a new fix puts you 312°T, 1.6 nm from Mill stack.

   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 85 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

2. At 1005 your fix is 246°T, 2.2 nm from Gannet Rock daybeacon. You steer 284°T at 4.7 kn through the water. At 1105 a new fix puts you 042°T, 3.4 nm from Heron Point Light.

   Plot the 1105 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 1230 your fix is 089°T, 2.6 nm from Westfield church spire. You steer 129°T at 5.6 kn through the water. At 1335 a new fix puts you 211°T, 2.5 nm from Gannet Rock daybeacon.

   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 65 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

4. At 1050 your fix is 263°T, 1.0 nm from Gannet Rock daybeacon. You steer 208°T at 4.2 kn through the water. At 1125 a new fix puts you 288°T, 2.4 nm from Kittle water tank.

   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 35 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

5. At 0940 your fix is 072°T, 1.7 nm from Heron Point Light. You steer 083°T at 6.5 kn through the water. At 1015 a new fix puts you 253°T, 2.3 nm from Gannet Rock daybeacon.

   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 35 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

6. At 1100 your fix is 359°T, 2.4 nm from Tern Island tower. You steer 220°T at 4.1 kn through the water. At 1205 a new fix puts you 269°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  

7. At 1235 your fix is 354°T, 1.0 nm from Heron Point Light. You steer 017°T at 5.0 kn through the water. At 1320 a new fix puts you 274°T, 3.6 nm from Tern Island tower.

   Plot the 1320 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  

8. At 1345 your fix is 084°T, 2.1 nm from Gannet Rock daybeacon. You steer 010°T at 4.8 kn through the water. At 1440 a new fix puts you 054°T, 4.3 nm from Tern Island tower.

   Plot the 1440 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