F-22 

 cm/sec may be spurious caused by tugs on the sled which 

 cannot be resolved in the navigated sled track. Mean velo- 

 cities are least in Oceanographer Canyon (Fig. F-12) and 

 greatest in Lydonia Canyon (Fig. F-13) . The currents in 

 Baltimore and Oceanographer Canyons have a dominant flow dir- 

 ection towards the ESE and the NE. For the same regions of the 

 canyon current vectors are consistent from one sled track 

 to the next. At the sled track intersection the directions 

 have a mean deviation of 25 . Direction changes are attri- 

 buted to diurnal tidal variations which in Baltimore Canyon 

 are exemplified by the current changes seen along Camera Run 

 #6. The measured currents tend to flow down canyon walls and 

 up and down canyon axes. Oceanographer Canyon shows a strong 

 cross-canyon flow towards the east, a feature observed in 

 Hydrographer Canyon (Keller and Shepard, 1978) . In Lydonia 

 Canyon the common current directions are SW and WNW. The 

 change here to westerly direction may be explained by the 

 fact that the camera runs were during different parts of the 

 diurnal cycle than the runs in Oceanographer Canyon. 



Since the directions vary with the tidal cycle and since 

 the sled measures only the instantaneous current vector, current 

 directions are ephemeral and should not be given too much 

 significance. Current velocities measured during the field 

 program, however, are consistently higher than those measured 

 by long term moored arrays in Hydrographer Canyon (Keller 

 and Shepard, 1978) . The higher velocities might be attributed 

 to our instrument. The Savonius rotor has a certain amount 

 of inertia and if the towing causes strumming on the rope. 



