31. This is a technique known as dead reckoning . 32. Often the dead reckoning DR position is used. 33. This is necessary to perform accurate dead reckoning . 34. Dead reckoning is subject to cumulative errors.35. The inquiry thought it was probable that the crew relied on dead reckoning rather than radio compass. 36. Briefly, Inertial navigation system outputs are used in a dead reckoning calculation to estimate the shearer positions. 37. Dead reckoning in the air is similar to dead reckoning on the sea, but slightly more complicated.38. Dead reckoning in the air is similar to dead reckoning on the sea, but slightly more complicated. 39. Using Dead Reckoning , Riley and his crew ventured into areas overrun with zombies to scavenge for supplies. 40. The school consisted of a rigorous 18-week course consisting of instruction in celestial navigation and dead reckoning .
