Worksheet 755 · 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 1255 you fix your position 072°T, 2.0 nm from Westfield church spire. You steer 154°T at 9.6 kn until 1305, then 070°T at 6.4 kn until 1340.

   Give the 1340 DR position as the true bearing FROM Tern Island tower 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 Tern Island tower: ________ °T   Distance: ________ nm  

2. At 0940 you fix your position 038°T, 1.4 nm from Tern Island tower. You steer 151°T at 6.8 kn until 1010, then 275°T at 8.0 kn until 1040.

   Give the 1040 DR position as the true bearing FROM Tern Island tower 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 Tern Island tower: ________ °T   Distance: ________ nm  

3. At 1345 you fix your position 308°T, 0.8 nm from Gannet Rock daybeacon. You steer 076°T at 9.2 kn until 1405, then 148°T at 5.2 kn until 1420.

   Give the 1420 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  

4. At 1320 you fix your position 297°T, 1.5 nm from Gannet Rock daybeacon. You steer 301°T at 6.8 kn until 1340, then 205°T at 6.2 kn until 1415.

   Give the 1415 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  

5. At 0945 you fix your position 274°T, 1.4 nm from Gannet Rock daybeacon. You steer 044°T at 4.9 kn until 1015, then 104°T at 4.3 kn until 1040.

   Give the 1040 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  

6. At 1310 you fix your position 086°T, 2.9 nm from Westfield church spire. You steer 031°T at 9.6 kn until 1330, then 160°T at 9.2 kn until 1405.

   Give the 1405 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  

7. At 0850 you fix your position 074°T, 2.5 nm from Tern Island tower. You steer 344°T at 4.7 kn until 0900, then 278°T at 5.5 kn until 0915.

   Give the 0915 DR position as the true bearing FROM Tern Island tower 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 Tern Island tower: ________ °T   Distance: ________ nm  

8. At 0925 you fix your position 247°T, 2.1 nm from Tern Island tower. You steer 163°T at 7.4 kn until 0945, then 304°T at 8.5 kn until 1030.

   Give the 1030 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