394 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Dredging Table Fo. 2 is taken from tlie original records of six hauls of the beam 
trawl, and shows a fair average of the Albatross’s work under ordinary conditions: 
Dredging Table No. 2. 
Serial 
Nos. 
Depth of 
water. 
Scope of 
dredge 
rope. 
Time 
per 100 
lilt horns 
going 
down. 
Time trawl 
was 
dragged on 
bottom. 
Approxi- 
mate 
distance 
trawl was 
dragged 
on 
bottom. 
Time 
per 100 
fathoms 
coming 
up. 
L. B. T.= 
Large 
beam 
trawl. 
S. B. T.= 
Small 
beam 
trawl. 
Load in trawl 
net. 
Station. 
Fathoms. 
Fathoms. 
M. 
S. 
77. M. S. 
Knots. 
M. 
S. 
Beam 
trawl. 
25(55 
2, 009 
3, 000 
3 
42 
1 18 30 
3.0 
3 
06 
L. B. T. 
Light. 
2566 
2, 620 
4,000 
3 
54 
2 12 00 
2.0 
3 
59 
L. B. T. 
Ordinary. 
2570 
1,813 
2, 700 
3 
36 
1 13 30 
1.0 
3 
45 
L. B. T. 
Do. 
2571 
1, 356 
2, 200 
3 
50 
1 23 30 
1.0 
3 
55 
L. B. T. 
Do. 
2572 
1,769 
2, 800 
4 
00 
0 55 40 
0.5 
4 
54 
L. B. T. 
Heavy. 
2575 
1,710 
2, GOO 
4 
12 
1 31 00 
1.0 
4 
24 
S. B. T. 
Ordinary. 
The scope of dredge rope is greater than is given in Table 1, and serves to 
illustrate some of the exceptions to the rule there given. 
In No. 2565 the excess was allowed for the purpose of rapid towing, as will be 
seen by the distance it was dragged. It was the hrst station occupied in the imme- 
diate neighliorhood and it was assumed that the depth was practically uniform, but 
the succeeiling sounding showed that it had increased 551 fathoms and that the 
trawl had kept the bottom but a short time. The rapid rate at which it was hove up 
resulted from the light weight in the net at the start, which gave the impression 
that it was a waterhaul and no harm could come from recovering it rapidly. A 
variety of bottom forms found in the net was, however, sufficient evidence of its having 
been on the botton. 
In the next haul. No. 2566, allowance was made for increasing depth, and the 
speed was reduced, the results showing that the calculations were sufficiently accurate 
to secure an excellent haul. 
In the two following hauls a liberal allowance of rope was given on account of 
the uneven bottom and the results were normal, but in No. 2572 the trawl encountered 
an elevation into which it cut, jienetrating the covering of ooze and bringing up an 
overload of gravel. 
During the haul No. 2574 the trawl encountered an obstruction from which it 
could not be cleared and it was lost, hence the use of a small trawl at No. 2575. It 
was handled with care, and hove up slowly to avoid injury to delicate specimens, as 
the net was intended for shoal water and did not afford as much protection as those 
designed for deep-sea work. 
To land the trawl on deck, hoist it to the boom end, when the bag will hang a little 
above water, put a strap around it and hoist it inboard with the boom tackle, either 
by hand or steam. If it is found to have a heavy load when it reaches the surface, 
suspend it for a moment, with the lead rope just out of water, ascertain its weight, 
then run it up to the boom end, or put a running bowline around it and take part of the 
weight with a tackle, and when it is up put a strap around it below the bowline and 
hoist it on board with the tackle, assisted by the after boom guy if necessary. 
The critical moment in landing a heavily laden trawl is wffien the bag leaves 
the water, for if it was near the limit of safety when submerged its increased weight 
in air might greatly exceed it. In the event of the load being too great to warrant 
