TABLE 2 

 Basic Statistical Data on Pitch Angles 



Sea 

 Slate 

 (Est'd) 



Significant 

 Wave 

 Height 



ft 



tteading of 



Waves Relative 



to Ship 



Ship 

 Speed 



knots* 



N 

 Number of 

 Variations 

 per Hour 



Minutes 

 Sampled 



E 

 deg2 



Predicted 



Maximum 



Value for 



1-hr Operation 



Maximum 

 Measured 

 Peak-to-Peak 

 Variation 

 deg 



Number of Variations 



in Sample 



from Which 



Maximum Was Obtained 



Predicted 



Maximum 



Peak-to-Peak 



Variation 



Ratio 



Predicted 



Maximum to 



Measured Maximum 



2 



e 



Head 

 Seas 



7-7 1/2 

 10 

 14 

 17 



480 

 555 



30 

 32 



4.00 

 4.48 



5.0 

 5.3 



4.8 

 5.3 



240 

 296 



4.68 

 5.04 



0.98 

 0.95 



2 



6 



Quarter 

 Head 

 Seas 



7-7 1/2 

 10 

 14 

 17 



404 

 514 



37 

 32 



1.97 

 1.86 



3.4 



3.5 



3.1 

 3.3 



249 

 274 



3.3 

 3.24 



1.06 

 0.98 



2 



6 



Beam 

 Seas 



7-7 1/2 

 10 

 14 

 17 



561 

 643 



29 1/2 

 32 



5.40 

 3.75 



5.9 

 4.9 



6.2 

 4.8 



276 

 343 



5.5 

 4.69 



0.89 

 0.98 



2 



6 



Quarter 



Following 



Seas 



7-7 1/2 

 10 

 14 

 17 



583 



29 



1.68 



3.3 



3.5 



282 



3.08 



0.88 



2 



6 



Following 

 Seas 



7-7 V2 

 10 

 14 

 17 



578 



32 



1.86 



3.5 



3.8 



308 



3.27 



0.86 



3 



7-9 



Head 

 Seas 



10 

 14 

 17 



583 

 603 

 616 



26 

 32 

 27 



10.35 

 9.62 

 9.59 



8.1 

 7.8 

 7.9 



7.6 

 7.3 

 6.7 



253 

 321 

 277 



7.56 

 7.49 

 7.34 



0.99 

 1.03 

 1.09 



3 



7-9 



Quarter 

 Head 

 Seas 



10 

 14 

 17 



587 

 592 



27 1/2 

 37 



1.79 

 2.02 



3.4 



3.6 



3.1 

 3.9 



269 

 365 



3.16 

 3.45 



1.02 

 0.89 



3 



7-9 



Beam 

 Seas 



10 

 14 

 17 



542 

 298 



29 

 26 



3.52 

 1.08 



4.7 

 2.5 



4.3 

 3.3 



262 

 129 



4.44 

 2.29 



1.03 

 0.70 



3 



7-9 



Quarter 



Following 



Seas 



10 

 14 

 17 



523 



31 



1.85 



3.4 



3.9 



270 



3.16 



0.85 



3 



7-9 



Following 

 Seas 



14 

 17 



504 



23 



1.28 



2.8 



2.4 



193 



2.59 



1.08 



4 



16 



Head 

 Seas 



14 



578 



30 



26.12 



12.9 



11.6 



289 



12.1 



1.00 



5 



21 



Head 

 Seas 



7 1/2 



10 



14 



517 

 583 



27 1/2 

 24 



47.32 

 56.00 



17.2 

 18.9 



18.0 

 15.5 



236 

 235 



16.1 

 17.4 



0.90 

 1.16 



5 



21 



Quartei 

 Head 

 Seas 



7 1/2 



10 



14 



541 

 577 



38 1/2 

 28 1/2 



35.13 

 47.14 



14.9 

 17.3 



13.9 

 16.5 



347 

 274 



14.3 

 16.3 



1.03 

 0.99 



5 



21 



Beam 

 Seas 



7 1/2 



364 



30 



16.78 



9.9 



8.8 



182 



9.34 



1.06 



5 



21 



Quarter 



Following 



Seas 



7 1/2 



10 



14 



368 

 296 

 302 



28 1/2 

 29 

 27 



20.24 

 28.00 

 17.2 



10.9 

 12.6 

 9.9 



9.8 

 11.5 



8.8 



175 

 143 

 136 



10.2 

 11.8 

 9.16 



1.04 

 1.02 

 1.04 



. 5 



21 



Following 

 Seas 



7 1/2 



10 



14 



291 

 273 



33 

 31 



31.12 

 20.54 



13.3 

 10.8 



11.8 

 10.8 



160 

 140 



12.58 

 10.1 



1.06 

 0.94 



*The speed is the nominal speed read from a calibration curve of propeller rpm versus knots; 

 7 1/2, 10, 14, and 17 kno.t8 correspond to 94, 127, 185, and 230 rpm, respectively. 



11 



