Worksheet 203 · Skill 3

Dead reckoning

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 1125 you fix your position 038°T, 1.5 nm from Heron Point Light. You steer 358°T at 4.9 kn until 1155, then 140°T at 6.4 kn until 1240.

   Give the 1240 DR position as the true bearing FROM Mill stack to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

   Tolerance: 2° and 0.15 nm (or 4 % of the distance).

   Bearing from Mill stack: ________ °T   Distance: ________ nm  

2. At 1210 you fix your position 202°T, 2.0 nm from Gannet Rock daybeacon. You steer 220°T at 5.8 kn until 1220, then 066°T at 6.1 kn until 1305.

   Give the 1305 DR position as the true bearing FROM Kittle water tank to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

   Tolerance: 2° and 0.15 nm (or 4 % of the distance).

   Bearing from Kittle water tank: ________ °T   Distance: ________ nm  

3. At 0835 you fix your position 019°T, 2.9 nm from Westfield church spire. You steer 155°T at 9.4 kn until 0920, then 306°T at 5.3 kn until 1005.

   Give the 1005 DR position as the true bearing FROM Westfield church spire to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

   Tolerance: 2° and 0.15 nm (or 4 % of the distance).

   Bearing from Westfield church spire: ________ °T   Distance: ________ nm  

4. At 1215 you fix your position 038°T, 4.8 nm from Gannet Rock daybeacon. You steer 179°T at 7.5 kn until 1245, then 353°T at 7.7 kn until 1310.

   Give the 1310 DR position as the true bearing FROM Gannet Rock daybeacon to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

   Tolerance: 2° and 0.15 nm (or 4 % of the distance).

   Bearing from Gannet Rock daybeacon: ________ °T   Distance: ________ nm  

5. At 1255 you fix your position 257°T, 3.3 nm from Tern Island tower. You steer 056°T at 5.8 kn until 1315, then 211°T at 6.4 kn until 1355.

   Give the 1355 DR position as the true bearing FROM Heron Point Light to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

   Tolerance: 2° and 0.15 nm (or 4 % of the distance).

   Bearing from Heron Point Light: ________ °T   Distance: ________ nm  

6. At 1000 you fix your position 086°T, 2.9 nm from Westfield church spire. You steer 237°T at 5.9 kn until 1010, then 352°T at 9.2 kn until 1025.

   Give the 1025 DR position as the true bearing FROM Westfield church spire to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

   Tolerance: 2° and 0.15 nm (or 4 % of the distance).

   Bearing from Westfield church spire: ________ °T   Distance: ________ nm  

7. At 0935 you fix your position 281°T, 2.3 nm from Tern Island tower. You steer 168°T at 9.1 kn until 1010, then 027°T at 5.6 kn until 1030.

   Give the 1030 DR position as the true bearing FROM Gannet Rock daybeacon to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

   Tolerance: 2° and 0.15 nm (or 4 % of the distance).

   Bearing from Gannet Rock daybeacon: ________ °T   Distance: ________ nm  

8. At 0750 you fix your position 241°T, 3.3 nm from Tern Island tower. You steer 169°T at 4.2 kn until 0800, then 310°T at 4.0 kn until 0830.

   Give the 0830 DR position as the true bearing FROM Westfield church spire to the DR, and the distance. Courses are true and speeds are through the water; dead reckoning ignores current and leeway.

   Tolerance: 2° and 0.15 nm (or 4 % of the distance).

   Bearing from Westfield church spire: ________ °T   Distance: ________ nm