The attitude characteristics of two small research vessels, a 539-ton monohull (R/V Point Sur) and a 419-ton SWATH (R/V Western Flyer), are compared. The comparison is based upon 134 (61) motion measurements carried out on the R/V Point Sur (Western Flyer) in 2003 and 2004. Measurements were made using a tilt meter and a vertical gyro. When the vessels were on station, root mean square roll on the R/V Point Sur (Western Flyer) increased 0.23 (0.12) degrees and pitch increased 0.12 (0.06) degrees per foot of sea height for seas between two and twelve feet. Corresponding on-station rates of increase for vertical acceleration for the stern at the side were 0.18 m/s2 (0.03 m/s2) per foot for the R/V Point Sur (Western Flyer) and reached 1/4 g for the R/V Point Sur for 15-ft. seas. Similar accelerations were observed at full speed when seas greater than 10 ft. were forward of the bow on the R/V Point Sur. For R/V Point Sur, observed directional response at full speed and pitch and roll damping were in good agreement with values obtained from tank tests in 1979.
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机译：比较了两艘小型研究船（539吨单体船（R / V Point Sur）和419吨SWATH（R / V Western Flyer）的姿态特性。比较是基于2003年和2004年在R / V Point Sur（西方摩天轮）上进行的134（61）次运动测量。测量是使用倾斜仪和垂直陀螺仪进行的。当船只停靠时，在两英尺和十二英尺之间的海域中，R / V Point Sur（西方摩天轮）的均方根摇晃度增加了0.23（0.12）度，俯仰角增加了0.12（0.06）度。 R / V Point Sur（Western Flyer）相对于船尾的垂直加速度，其在船上的垂直上升速率为每英尺0.18 m / s2（0.03 m / s2），而R / V达到1/4 g 15英尺高的V Point Sur海域。当R / V Point Sur上的船首前方大于10英尺的海面时，在全速下观察到类似的加速度。对于R / V Point Sur，在全速，俯仰和侧倾阻尼下观察到的方向响应与1979年坦克试验获得的值非常吻合。
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