Blowback Calculations
BLOWBACK
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Simply stated, blowback is what happens to the down-
rigger weight when you pull it through the water behind
your boat. As your speed increases, so does the hori-
zontal distance between the weight and your downrig-
ger. The faster you go, the farther the weight is behind
you. The farther the weight is behind you, the shallower
the weight is.
The following charts provide you with blowback informa-
tion for three sizes of Cannon downrigger weights pulled
at three different speeds with no lures attached and
with no current. Current drag, water salinity and the use
of non-Cannon products will affect your actual trolling
depth.
As an example, the fi rst chart shows that if you are troll-
ing at 4 MPH with an 8 pound weight and you have 100
FT. of cable in the water with no current; the downrigger
ball is actually at a depth of about 80 FT.
12-Lb. Weight at 2, 4, and 6 MPH
2 MPH
4 MPH
6 MPH
Actual Depth of W
eight (ft.)
Amount of Cable in Water (ft.)
4 MPH
6 MPH
Amount of Cable in Water (ft.)
ActualDepth of W
eight (ft.)
2 MPH
8-Lb. Weight at 2, 4, and 6 MPH
2 MPH
4 MPH
6 MPH
Actual Depth of W
eight (ft.)
Amount of Cable in Water (ft.)
Blowback Charts
10-Lb. Weight at 2, 4, and 6 MPH
