Current Meters: Current measurements at ARGUS ISLAM) are 

 obtained with a combination Savonius rotor current meter and Hytech 

 current direction-finder. One pair of instruments was located at a 

 depth of 8 meters and another at 30 meters. The plastic Savonius rotor 

 transmits pulses to a surface receiver. Current speed is proportional 

 to the number of pulses per second (Beckner, 1966) . The direction- 

 finder consists of a movable vane which alines itself with the direction 

 of the current and transmits its alignment relative to a magnetic com- 

 pass. 



Fluororaeter: The portable dye -monitoring equipment consists 

 of a Turner Model-Ill fluorometer. The equipment is operated from a 

 small boat so that measurements can be taken throughout a dye patch. 

 Dye concentrations are measured by exciting the dye molecules in a 

 water sample to fluorescence with the green line (0.5^6 micron) of 

 mercury. The intensity of fluorescence is proportional to the concen- 

 tration of dye. The fluorometer contains an optical bridge which 

 measures the difference between light emitted by the sample and that 

 emitted by a reference source. A single photomultiplier views light 

 alternately from the sample and a reference, and generates a propor- 

 tional electrical signal. A recorder indicates the concentration of 

 dye in the sample (Fisher and Gallagher, 1962). 



GENERAL PROCEDURE 



Cape Hatteras to Bermuda 



The NASA and ASWEPS aircraft departed Elizabeth City, Worth Caro- 

 lina, on 6 March 1966. Simultaneous infrared scanner, microwave, and 

 radiation thermometer measurements and multiband photography were ob- 

 tained over the Gulf Stream near Cape Hatteras (figure k) . 



( — T........-F- — T- r r ■ ■- r — T-- ■ ■■"■-■ ■"..■■■■■ ■■ t i im*. 



Figure 4 Flight Track, U. S. to Bermuda— 6 March 1966 



