attached above the frame to record 

 sampling depth throughout the tow. 

 Digital flow meters were suspended 

 within the mouths of the bongo 

 samplers. Towing wire metering was 

 employed, but no wire angle 

 inclinometers were used. Tow speeds of 

 approximately 2 knots were maintained 

 by engaging and disengaging the vessel's 

 main drive. Plankton tows were made at 

 all stations along transects A through G 

 (Figure 1). 



The Hardy Continuous Plankton 

 Recorder (CPR) was towed at a 

 standard depth of 10 meters. Towing 

 speed was 9 knots, and mesh aperture 

 was 225 X 234 microns, when wet. A 

 continuous record of the zooplankton 

 and larger phytoplankton was thus 

 obtained along transects L through Q 

 (Figure 2). 



A CTD with rosette, fluorometer, 

 and transmissometer was deployed to 

 near bottom or a maximum depth of 250 

 m at all stations along transect A 

 through G. Temperature, salinity, 

 fluorescence, and light transmission data 

 were pressure averaged by one meter. 

 Water samples were taken at up to six 

 standard levels (2 m, 10 m, 30 m, 50 m, 

 75 m, and near bottom) depth 

 permitting, and samples were frozen for 

 subsequent nutrient analysis. Samples to 

 the standard depth of 75 m were filtered 

 and frozen for chlorophyll calibration 

 purposes, from one inshore, one 

 midshelf, and one offshore station on 

 each transect 



Continuous measurement of 

 fluorescence at a depth of 2 m was 

 made using a flow-through fluorometer 

 connected in line with the ship's sea 

 water system for the entire cruise track. 

 During CPR towing no less than two, 

 water samples were taken from a depth 

 of 2 m, filtered, and frozen per day for 

 calibration purposes. Two-meter depth 



water samples were taken at the ends of 

 the station transect for calibration 

 purposes. Surface temperature was 

 determined at each station with a stem 

 thermometer and bucket. 



At each station the bottom depth, 

 wind speed and direction, air 

 temperature, wet bulb temperature, 

 atmospheric pressure, cloud type and 

 amount, and wave height were recorded. 



RESULTS 



A summary of the measurements 

 accomplished is given in Table 1. 

 Continuous plankton records were 

 obtained from 944 of the 1,000 desired 

 miles. This difference was due to the 

 entangling of a sandbar shark in the 

 drive mechanism of the CPR. All 70 of 

 the desired bongo tows were made. 

 CTD, nutrient and fluorescence data 

 were obtained from 66 of the 70 planned 

 stations. The power supply to the CTD 

 and rosette failed with 10 stations to go, 

 forcing a switch to a self contained CDT 

 and individual water bottles. Underway, 

 2-m fluorescence data were obtained 

 from the entire cruise track. 



Preliminary processing of digital 

 data was done on board and plots of 

 temperature, salinity, sigma-t, 

 fluorescence, and light transmission 

 were prepared. Preliminary plots are 

 given in Appendix I. They are presently 

 undergoing quality control, and are, in 

 some cases, displayed in relative units. 

 Thus, they should be interpreted 

 accordingly. 



Several conclusions can be drawn 

 from the preliminary examination of the 

 cruise results: 



(a) A short station transect 

 should be added from the vicinity of 

 Provincetown, Massachusetts, to 

 Portland, Maine, to fill a gap in the 

 station array; 



