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get yourself a twin frequency sounder 45' and 8' transducers in deep water you can pick a wreck up on the 45 and home in on it with the 8 then take the numbers a 20 deg plus side-lobes is 60 deg that's why you can mark the wreck and you are no where near it and miss it on the drift i used to run with two sounders the wreck would mark on the 45 then appear on the 8 by doing a few drifts you could determine which way it is lying its all practice once you get used to your gear you get a mental picture of what's going on, best thing I had was a Westmar scanning sonar on to a colour tv, motor scanning 15 degs port to starboard 45 degs ahead once you marked something just keep knocking the tilt down till you were at 90 degs and you were bang ontop then you could watch your drift magic

<blockquote data-quote="Joe-m" data-source="post: 1288640" data-attributes="member: 6934"><p>get yourself a twin frequency sounder 45&#039; and 8&#039;&nbsp; transducers in deep water you can pick a wreck up on the 45 and home in on it with the 8 then take the numbers a 20 deg plus side-lobes is 60 deg that&#039;s why you can mark the wreck and you are no where near it and miss it on the drift i used to run with two sounders the wreck would mark on the 45 then appear on the 8 by doing a few drifts you could determine which way it is lying its all practice once you get used to your gear you get a mental picture of what&#039;s going on, best thing I had was a Westmar scanning sonar on to a colour tv, motor scanning 15 degs port to starboard 45 degs ahead once you marked something just keep knocking the tilt down till you were at 90 degs and you were bang ontop then you could watch your drift magic <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":)" title="Smile&nbsp; &nbsp; :)"&nbsp; data-smilie="1"data-shortname=":)" /></p></blockquote><p></p>

[QUOTE="Joe-m, post: 1288640, member: 6934"] get yourself a twin frequency sounder 45' and 8' transducers in deep water you can pick a wreck up on the 45 and home in on it with the 8 then take the numbers a 20 deg plus side-lobes is 60 deg that's why you can mark the wreck and you are no where near it and miss it on the drift i used to run with two sounders the wreck would mark on the 45 then appear on the 8 by doing a few drifts you could determine which way it is lying its all practice once you get used to your gear you get a mental picture of what's going on, best thing I had was a Westmar scanning sonar on to a colour tv, motor scanning 15 degs port to starboard 45 degs ahead once you marked something just keep knocking the tilt down till you were at 90 degs and you were bang ontop then you could watch your drift magic :) [/QUOTE]

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