Figure 10.8 Left: Relative current as a function of depth calculated from hydrographic data collected by the Endeavor cruise south of Cape Cod in August 1982. The Gulf Stream is the fast current shallower than 1000 decibars. The assumed depth of no motion is at 2000 decibars. Right: Cross section of potential density sq across the Gulf Stream along 63.66°W calculated from ctd data collected from Endeavor on 2528 April 1986. The Gulf Stream is centered on the steeply sloping contours shallower than 1000m between 40° and 41°. Notice that the vertical scale is 425 times the horizontal scale. Data contoured by Lynn Talley, Scripps Institution of Oceanography.