of the lightships in the North sea are greater than those of lightship 

 FEffiJlARNBELTo The fact that in the case of the lightships in the North 

 Sea, the wave heights Ho not reach zero with decreasing disturbances of 

 the sea, is due to the influence of swells which is negligible only in 

 the case of lightship FEfflMRNBELT. 



To get an idea of the spread of the values for wave heights 

 associated with particular states of the sea, the values in the following 

 table represent the number of times particular wave heights were observed 

 at different states of the sea. !Ihe wave heights are tabulated (table 3) 

 in 10 cm. intervals. l/l/Tiere intermediate values were estimated (H = 0.25) 

 they were listed alternately with the next higher and next lower values, 



TABLE 3 

 Frequency of Wave Heists at States of the Sea - Lightship FEHNARMBELT 



Wave height 







State 



of the 



Sea 







meters 



2 



3 



4 



5 



6 



7__ 



S 



0.10 



1 















.20 



18 



1 













,30 



33 



10 













.40 



16 



23 



8 











,.50 



5 



36 



2 











,60 



1 



19 



14 



2 









.70 



1 



10 



11 



2 









,80 





2 



22 



5 









,90 







9 



1 









1,00 







9 



16 









1.10 





1 



1 



9 



1 







1,20 









10 



2 







1,30 









11 



1 







• 1.40 









7 



7 







1,50 







1 





2 







1,60 









3 



2 



1 





1.70 









1 



4 







1,80 









3 



4 







1,90 











2. 



3 





2.00 









1 





5 





2,10 













3 





2,20 











2 



1 





2,30 











2 



1 





2,40 















1 



2,50 















3 



2,60 















1 



2,70 















1 



2,80 















1 



3.10 













1 





The wave height ranges for particular states of the sea over- 

 lap considerably. Observations from lightship FETO.IARNBELT can be sum- 

 marized as follows: 



