Worksheet 226 · Skill 5

Set and drift

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1. At 1010 your fix is 271°T, 1.9 nm from Gannet Rock daybeacon. You steer 279°T at 5.8 kn through the water. At 1050 a new fix puts you 095°T, 3.3 nm from Westfield church spire.

   Plot the 1050 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  

2. At 1155 your fix is 070°T, 1.7 nm from Heron Point Light. You steer 293°T at 4.1 kn through the water. At 1225 a new fix puts you 122°T, 1.9 nm from Westfield church spire.

   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 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

3. At 1115 your fix is 031°T, 3.9 nm from Westfield church spire. You steer 181°T at 5.3 kn through the water. At 1145 a new fix puts you 077°T, 3.0 nm from Westfield church spire.

   Plot the 1145 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  

4. At 0915 your fix is 025°T, 2.8 nm from Westfield church spire. You steer 135°T at 8.2 kn through the water. At 1010 a new fix puts you 010°T, 3.0 nm from Mill stack.

   Plot the 1010 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  

5. At 1250 your fix is 083°T, 1.2 nm from Westfield church spire. You steer 127°T at 7.4 kn through the water. At 1320 a new fix puts you 066°T, 2.2 nm from Heron Point Light.

   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 30 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

6. At 0810 your fix is 014°T, 3.5 nm from Westfield church spire. You steer 131°T at 5.6 kn through the water. At 0920 a new fix puts you 272°T, 1.8 nm from Gannet Rock daybeacon.

   Plot the 0920 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 70 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

7. At 0825 your fix is 024°T, 2.8 nm from Westfield church spire. You steer 139°T at 4.8 kn through the water. At 0910 a new fix puts you 091°T, 2.9 nm from Westfield church spire.

   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 45 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn  

8. At 1150 your fix is 358°T, 1.7 nm from Mill stack. You steer 027°T at 4.9 kn through the water. At 1225 a new fix puts you 218°T, 1.8 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 35 minutes).

   Tolerance: 4° and 0.15 kn.

   Set: ________ °T   Drift: ________ kn