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Hook units have a highly-detailed SONAR image ,
ensuring that you never miss a fish . CHIRP sonar allows for be er target defini on and separa on and dual frequency – making use of both 83 and 200 kilohertz .
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The Hook 4 range also includes DSI , or DownScan
Imaging . This is an addi onal sonar func on that gives you an almost 3D , picture-perfect view of underwater structure directly below the transducer . It is really easy to interpret – so if you ' re unsure of what you were seeing on the
2D sonar screen , you can switch over to DSI and the structure will reveal itself .
The Hook 4 is a combo unit . It includes a very accurate GPS - providing reliable naviga on that is easy to use . The Hook 4 comes with a basic background map , allowing you to mark waypoints and create routes and trails . However , most customers prefer to enhance their mapping detail by adding an external chart – you want to be able to view depths , drop offs , wrecks and reefs etc . BEFORE you get there , so that you know where to go to target the best fish .
For many chart op ons – for both offshore and inland anglers . You can even create your own chart by making use of Lowrance ' s FREE mapping service – called Insight Genesis (* just changed name to CMAP Genesis ).
For our offshore customers – you can connect your VHF radio to our Hook 4 units (* with the use of an addi onal cable ) to enable the required DSC func on . This makes our Hook 4 unit a very affordable op on for customers who s ll need to get their boat electronics SAMSA approved .
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The Hook 4 includes the very popular TrackBack feature . This feature enables you to scroll back through your sonar history so that you can view spots that you otherwise would have missed . You don ' t have to waste petrol on your boat - just TrackBack ! If you find a good spot , you can easily mark it as a waypoint by double-tapping the ENTER bu on . Easy , fast and convenient .
However , Lowrance units con nue pinging ( sending out a sonar signal ) even when the cursor is ac vated and you are viewing history - and this makes the LOWRANCE TrackBack more efficient . You can also move your cursor directly on top of the spot you want to mark and get the exact depth measurement .
With other cheap compe tor products , you cannot ac vate cursor mode - you have to physically go over the point you want to mark with your boat . This means that your marks are not always as accurate , and you also waste petrol and me trying to find the exact spot you want to mark .
When combining the CHIRP and DSI func on , fish really have nowhere to hide ! You can choose to split your screen , or even overlay the DSI view on top of the 2D sonar view . It is important to note that Lowrance was the forerunner in viewing structure at such great detail - having invented the transducer element that allows for this DownScan view . And we have been improving on it .
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