ALBATROSS EXPLORATIONS; ALASKA, WASHINGTON, AND OREGON. 25 
8. SANNAKH ISLANDS TO THE SHUMAGIN ISLANDS, INCLUDING SANNAKH 
BANK. 
REPORTED DANGERS SOUTH OP THE SANNAKH ISLANDS. 
Lenard RocJc and Anderson Boclt . — “ We were uiuler low speed during the night 
and early morning of July 31, awaiting daylight, to approach reported dangers — the 
first, Lenard Eock, in latitude 54° NT., longitude 163° 12' W., and the second, Ander- 
son Eock, in latitude 54° JST., longitude 162° 47' W., the latter showing above water. 
We intended passing over the positions given, and supposed we had done so until 
some hours later, when we found that we were about 12 miles IST, 57° E. out of our 
reckoning. The low speed at which we ran all night and the prevalence of a moderate 
southerly breeze probably account for the unusual effect of current upon our positions. 
At 7.45 a. m. we left the above station, and stood S. 7° E., 10 miles, finding bottom at 
51 and 464 fathoms, the latter S. 52° E., 3 miles from the reported position of Ander- 
son Eock. We saw no indications of shoal water, but that proved nothing, as we were 
enveloped in so dense a fog that we were unable to see more than a quarter of a mile, 
most of the time, and jirobably not to exceed one-half mile at any time while we were 
in the vicinity. 
“ The rock may be in or near the position assigned it, but, considering the influence 
of the current on our course from Promontory Cape and the absence of any indication 
of shoal water in our last two soundings, it seems possible that the rock seen by Captain 
Anderson might have been one of the outer rocks on the Sannakh Eeefs.” 
SANNAKH BANK. 
Hydrography . — The shoal-water area of Davidson Bank (43 to 44 fathoms) was 
traced eastward between the Sannakh Islands and the reported positions of Lenard 
Eock and Anderson Eock, in a single line of soundings, extending about half the 
length of the former group. In about the same latitude as this line of soundings, but 
farther to the eastward (latitude 54° 08' E., longitude 162° 22' W.), a depth of 60 
fathoms was found. Immediately to the northeastward of this position is an extensive 
shoal area, called Sannakh Bank. It lies to the east and southeast of the Sannakh 
Islands, is somewhat elongate in shape, and trends in a general way northeast and 
southwest. Four lines of soundings, approximately parallel with this trend, were 
run through the region containing this bank. A small area with soundings of 30 to 
37 fathoms is about central in latitude 54° 20' N., longitude 161° 53' west. 
Directly north of this shallow water, in the direction of the Sandman Eeefs, 
depths of 63 to 82 fathoms were found; but it is bordered on the southeast, south, 
and southwest by a considerable area having depths of 40 to 60 fathoms. The con- 
nection between the bank and the islands of the same name was not determined, nor 
was the 100-fathom curve on the southern side developed, but near the southwestern 
end a depth of 435 fathoms was found close by 67 fathoms. 
The estimated area of the bank was 1,300 square miles. Much of the bottom was 
found to be rocky. Sand, pebbles, gravel, etc., also occur. 
Dredging . — No dredging was done on the main part of Sannakh Bank, but the 
beam trawl was used at Station No. 2846, about 15 miles south of Sannakh Island 
(latitude 54° 08' N., longitude 162° 44' W.), 44 fathoms, gravel bottom. The net came 
