Mariner Perception of Yaw, Yaw Rate and Bearing as a Function of Ship Size and Mariner Experience

摘要

This CAORF research study consists of two separate but related experiments. The first experiment examined the effects of mariner experience (master vs. pilot) and ship size on mariner ability to estimate the relative bearing of a sea buoy. It was found that mariner ability to estimate this bearing was significantly altered when the mariner transferred from a 30,000 DWT to 250,000 DWT tanker. Mariner experience, however, was only a significant factor in cases where a pelorus was used. Pilots, who have little experience taking bearings with a pelorus, fared worse in these instances. The second experiment examined the effects of mariner experience, ship size, ship speed, and rudder angle on mariner perception of yaw and yaw rate. Detection of initial yaw motion was found to be twice as late on the larger ships while detection of both initial yaw and yaw rate was earlier increased with ship speed and/or rudder angle.