List of Illustrations 



Fijfure Page 



1. Areas surveyed monthly by the Tiburon Marine Laboratory in 



cooperation with the U.S. Coast Guard 8 



2. Airborne radiation thermometer unit mounted for use in U.S. 



Coast Guard aircraft 9 



3. Southern survey area flight track 10 



4. Central survey area flight track 11 



5. Northern survey area flight track 12 



6. Recorder trace showing the comparative check on the operation 



of the ART unit by viewing a well-stirred water bath 13 



7. Slide-rule type readout device for determining two-minute aver- 



age temperatures 14 



8. to 43. Mean monthly isotherm charts: 



Southern survey area 15 



Central survey area 27 



Northern survey area 39 



vi 



