Nantucket Shoal Lightship 



Note: Nantucket Lightship moved at the first of the year 

 from l40°37 '00"N, 69°l8'30"W, a position she had occupied for nearly 

 three years, to U0O33'00"N, 69°28'00"W. 



Minimum surface temperatures of 38°F were recorded in early 

 March and maximum temperatures of 70°F were recorded in mid-September. 



The whole water column was virtually isothermal durin ' the 

 first five months of the year. The thermocline commenced development 

 in early June and reached its peak in mid-Seutember. Maximum bottom 

 temperatures occurred during the first third of November, 



Surface salinity ranged between 32°/00 and 3ii.?°/00, the 

 minimum occurring in mid-simmer and the maximum in raid -Sep tan ber. 

 Bottom salinities were dose to the surface salinities for the first 

 two- thirds of the year but were slightly hi^iher during the autumn. 



3T 



