Humminbird - Fish Finders and GPS
Humminbird - Fish Finders and GPS
Humminbird - Fish Finders and GPS
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Boat navigation: It is important to underst<strong>and</strong> that when the boat turns,<br />
successive beam strips to one side will begin to overlap <strong>and</strong> the strips on the<br />
other side will fan out, providing some distortion to the image. Because of<br />
this, the best imaging performance is produced by straight line navigation<br />
<strong>and</strong> minimal side-to-side boat motion (i.e. wave induced, etc.) This applies to<br />
navigation by either the main engine or the trolling motor. Minimize turning<br />
time <strong>and</strong> avoid wave action that induces large side-to-side rocking of the<br />
boat. For example, if there is a lot of wave activity, try to move the boat so<br />
that it is perpendicular to the waves instead of parallel with the waves in<br />
order to minimize the side-to-side rocking of the boat.<br />
Submerged Bridge, Creek Channel <strong>and</strong> New Bridge Piling<br />
1<br />
2<br />
3<br />
Beam Coverage: When there is an area directly under the boat that does not<br />
have SI beam coverage, this area will be covered by the st<strong>and</strong>ard 200/83 kHz<br />
down-looking beam <strong>and</strong> displayed in the Sonar views. The net effect of this,<br />
on the display, is that a single object may appear as two separate entities<br />
when in reality, it is one continuous object. See Submerged Bridge: A<br />
Closer Perspective <strong>and</strong> the Submerged Bridge graphics on the next page<br />
for examples of this.<br />
1<br />
2<br />
New bridge pilings<br />
Creek channel<br />
Submerged Ravine with Timber<br />
Submerged bridge 3<br />
2<br />
3<br />
4<br />
1<br />
1<br />
2<br />
Possible drop off<br />
Submerged timber<br />
Submerged tree 3<br />
Submerged ravine 4<br />
32