BIGELOW: COAST WATER EXPLORATION OF 1913. 227 
At Station 10065, over the 45 fathom curve, fifty miles south of Long 
Island, the first reading was taken about five hours before high water 
at Fire Island Inlet, the nearest shore station for which tidal data is 
available. The surface current ran northwesterly for the first three 
hours; and then veered to the north and northeast, in which direction 
it flowed, till the end of the set. Of course the observation does not 
show conclusively whether or not there was a dominant drift in any 
direction, because it did not cover the 
last half of the ebb; but it goes far 
enough to show that the flood current 
ran about northwest; the first half of 
the ebb to the northeast, the strength 
ot the flood being .2-.6 knots, of the 
ebb .4—.7 knots per hour (Fig. 64). 
The total drift for the part of the tide 
covered by the set is about 1.8 knots 
north. And it seems hardly probable ee 
that the last few hours of the ebb would . ia seis 
wholly nullify this, the general trend of 
the coast in this region being such that 
it is safe to assume that the last part of 
the ebb flows about east, the first part 
of the flood westerly. And even if the 
late ebb ran southeast with a velocity 
| of .5 knots, there would still remain a : 
net northerly drift of nearly .5 knots. 3 RM,” 
It is therefore fair to conclude that Fic. 64.— Surface current 
there was a slight dominant northerly and bottom current...... at 
|} movement of the surface water over iiss aie Racket ge 
this part of the continental shelf. distance between dots (.) shows | 
The bottom current turned an hour the drift for each hour; 2.25 
é cm. = 1 sea mile. The compass 
earlier than the surface current. Dur- ETaaa HbA. Unie se aenn ie 
| ing the last three hours of the flood the 
| flow on the bottom was toward the northwest, with a velocity dimin- 
|ishing from .4 knot to zero. It then veered to the south by east, and 
south, running in that direction for three hours with the considerable 
velocity of .35-.5 knot per hour. The total set showed a net move- 
ment of water of about 1.4 knot toward the south-southwest; but it 
is a question whether there was any dominant flow on the bottom, 
he if the current veered to the southeast and east during the last of 
the ebb, with a northwest current throughout the flood, as is not 
unlikely, the net drift would be neutralized. 
ps P.M. 
