<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"></head><body ><div>Alan,</div><div>My Humminbird transducer is epoxy potted. The Humminbird 360 is oil filled. I don't think it is nessesary to build a houseing for it. </div><div>Thanks,</div><div>Scott Waters</div><div><br></div><div><br></div><div><div style="font-size:9px;color:#575757">Sent from my U.S. Cellular® Smartphone</div></div><div></div><br><br>-------- Original message --------<br>From: Alan James via Personal_Submersibles <personal_submersibles@psubs.org> <br>Date:05/15/2015 2:41 AM (GMT-08:00) <br>To: Personal Submersibles General Discussion <personal_submersibles@psubs.org> <br>Cc: <br>Subject: Re: [PSUBS-MAILIST] Fw: DOSITS: Forward Looking Sonar <br><br><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_1_1431681609941_2822"><span id="yui_3_16_0_1_1431681609941_2987">Have just come back from the local boat show after talking to a couple of</span></div><div id="yui_3_16_0_1_1431681609941_2822" dir="ltr"><span id="yui_3_16_0_1_1431681609941_3676">exhibitors about sonar / depth sounders.</span></div><div id="yui_3_16_0_1_1431681609941_2822" dir="ltr"><span id="yui_3_16_0_1_1431681609941_3342">I am still finding my way here. Was told I could mount a forward looking sonar inside</span></div><div id="yui_3_16_0_1_1431681609941_2822" dir="ltr"><span id="yui_3_16_0_1_1431681609941_3400">a fiberglass hull & would loose about 15% of my range as apposed to in water mounting.</span></div><div id="yui_3_16_0_1_1431681609941_2822" dir="ltr"><span id="yui_3_16_0_1_1431681609941_3399">They said the depth sounder worked better than the forward looking sonar through fiberglass.</span></div><div id="yui_3_16_0_1_1431681609941_2822" dir="ltr"><span id="yui_3_16_0_1_1431681609941_3343">Why not have a small view port type arrangement in the bottom or up front of the submarine</span></div><div id="yui_3_16_0_1_1431681609941_2822" dir="ltr"><span id="yui_3_16_0_1_1431681609941_3619">with a fiberglass plate in it. Then glue the transducer to that.</span></div><div id="yui_3_16_0_1_1431681609941_2822" dir="ltr"><span id="yui_3_16_0_1_1431681609941_4211">For a 3" diameter fiberglass plate .55" thick, I get a 4000ft crush depth. Safety factor of 4 for</span></div><div id="yui_3_16_0_1_1431681609941_2822" dir="ltr"><span id="yui_3_16_0_1_1431681609941_4223">plastics I think, so 500ft capable operating depth.</span></div><div id="yui_3_16_0_1_1431681609941_2822" dir="ltr">Quote from installation pdfs below......</div><div id="yui_3_16_0_1_1431681609941_2822" dir="ltr" class="" style="">As an alternative to transom mounting, it is possible on many</div><div id="yui_3_16_0_1_1431681609941_2822" dir="ltr" class="" style="">fiberglass-hulled boats to glue the transducer on the inside of</div><div id="yui_3_16_0_1_1431681609941_2822" dir="ltr" class="" style="">the boat hull. Since fiberglass has similar sonar</div><div id="yui_3_16_0_1_1431681609941_2822" dir="ltr" class="" style="">characteristics as water, the sonar signal can pass through</div><div id="yui_3_16_0_1_1431681609941_2822" dir="ltr" class="" style="">the boat hull with minimal loss. The hull of the boat must be</div><div id="yui_3_16_0_1_1431681609941_2822" dir="ltr" class="" style="">single layer construction (not double-hulled) Also, any air</div><div id="yui_3_16_0_1_1431681609941_2822" dir="ltr" class="" style="">trapped in the lamination of the fiberglass would prevent the</div><div id="yui_3_16_0_1_1431681609941_2822" dir="ltr" class="" style="">sonar signal from passing through.</div><div id="yui_3_16_0_1_1431681609941_2822" dir="ltr" class="" style="">Inside the hull installations require no holes be drilled into the</div><div id="yui_3_16_0_1_1431681609941_2822" dir="ltr" class="" style="">boat and through experimentation, high-speed operation</div><div id="yui_3_16_0_1_1431681609941_2822" dir="ltr" class="" style="">comparable to transom mounting can be achieved. Two-part</div><div id="yui_3_16_0_1_1431681609941_2822" dir="ltr"></div><div id="yui_3_16_0_1_1431681609941_2822" dir="ltr" class="" style="">slow cure epoxy (not included) is required to glue the transducer in place.</div><div id="yui_3_16_0_1_1431681609941_2822" dir="ltr" class="" style="">......<strong style="color: rgb(34, 34, 34); font-family: Arial, sans-serif; font-size: 12px; line-height: 1.5em;" class="">In-hull:</strong><span style="color: rgb(34, 34, 34); font-family: Arial, sans-serif; font-size: 12px; line-height: 1.5em;" class=""> </span><span style="color: rgb(34, 34, 34); font-family: Arial, sans-serif; font-size: 12px; line-height: 1.5em;" class="" id="yui_3_16_0_1_1431681609941_4501">Installed against the inside of the hull bottom, the in-hull transducer sends its signal through the hull. “Shoot through hull” transducers do not need direct water contact. They’re glued to the inside of the hull with silicone or epoxy. An in-hull transducer is a good choice for a trailered boat, a vessel with a stepped hull, and for other types of high performance hull designs, as there is no drag, hull penetration or potential for fouling. No integrated temperature sensor. Can be installed while boat is in the water. For deadrise angles up to 30 degrees. As with thru-hulls, the selected location should be aft and close to the centerline so that the transducer is in the water at all times.</span></div><div style="margin-top: 1em; margin-bottom: 1em; border: 0px; font-size: 12px; font-family: Arial, sans-serif; vertical-align: baseline; line-height: 1.5em; color: rgb(34, 34, 34);" dir="ltr" class="" id="yui_3_16_0_1_1431681609941_4500">In-hull transducers need solid fiberglass at the mounting location; no foam or plywood coring material, or air pockets. A typical 600W transducer can transmit through 1/2" to 5/8" (12-16mm) of fiberglass. To install inside a cored hull, find a location with no coring or remove the core material.</div><div style="margin-top: 1em; margin-bottom: 1em; border: 0px; font-size: 12px; font-family: Arial, sans-serif; vertical-align: baseline; line-height: 1.5em; color: rgb(34, 34, 34);" dir="ltr" class="" id="yui_3_16_0_1_1431681609941_4500">Alan</div><br> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1431681609941_2806"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1431681609941_2805"> <div dir="ltr" id="yui_3_16_0_1_1431681609941_2804"> <hr size="1" id="yui_3_16_0_1_1431681609941_2823"> <font size="2" face="Arial" id="yui_3_16_0_1_1431681609941_2821"> <b><span style="font-weight:bold;">From:</span></b> Alan via Personal_Submersibles <personal_submersibles@psubs.org><br> <b><span style="font-weight: bold;">To:</span></b> Personal Submersibles General Discussion <personal_submersibles@psubs.org> <br> <b><span style="font-weight: bold;">Sent:</span></b> Monday, May 11, 2015 5:10 AM<br> <b id="yui_3_16_0_1_1431681609941_4655"><span style="font-weight: bold;" id="yui_3_16_0_1_1431681609941_4654">Subject:</span></b> Re: [PSUBS-MAILIST] Fw: DOSITS: Forward Looking Sonar<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_1_1431681609941_3502"><br>Looks really nice Hank, but couldn't find a price.<br clear="none">They are marketing to ship owners not recreational boat market.<br clear="none">Had looked at other 3d forward scanners & they are quite a bit more than<br clear="none">the Sinrad 2d.<br clear="none">Alan <br clear="none"><br clear="none">Sent from my iPad<br clear="none"><br clear="none">> On 11/05/2015, at 12:26 am, hank pronk via Personal_Submersibles <<a shape="rect" ymailto="mailto:personal_submersibles@psubs.org" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br clear="none">> <br clear="none">> <br clear="none">> Alan,<br clear="none">> Check this system out, you probably have seen it. This would be very nice to have.<br clear="none">> Hank<br clear="none">>> --- On Sun, 5/10/15, hank pronk <<a shape="rect" ymailto="mailto:hankpronk@live.ca" href="mailto:hankpronk@live.ca">hankpronk@live.ca</a>> wrote:<br clear="none">>> <br clear="none">>> From: hank pronk <<a shape="rect" ymailto="mailto:hankpronk@live.ca" href="mailto:hankpronk@live.ca">hankpronk@live.ca</a>><br clear="none">>> Subject: DOSITS: Forward Looking Sonar<br clear="none">>> To: "<a shape="rect" ymailto="mailto:hanker_20032000@yahoo.ca" href="mailto:hanker_20032000@yahoo.ca">hanker_20032000@yahoo.ca</a>" <<a shape="rect" ymailto="mailto:hanker_20032000@yahoo.ca" href="mailto:hanker_20032000@yahoo.ca" id="yui_3_16_0_1_1431681609941_3503">hanker_20032000@yahoo.ca</a>><br clear="none">>> Received: Sunday, May 10, 2015, 8:25 AM<br clear="none">>> <br clear="none">>> <br clear="none">>> <br clear="none">>> <a shape="rect" href="http://www.dosits.org/technology/locatingobjectsusingsonar/forwardlookingsonar/" target="_blank" id="yui_3_16_0_1_1431681609941_3504">http://www.dosits.org/technology/locatingobjectsusingsonar/forwardlookingsonar/</a><br clear="none">> _______________________________________________<br clear="none">> Personal_Submersibles mailing list<br clear="none">> <a shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" href="mailto:Personal_Submersibles@psubs.org" id="yui_3_16_0_1_1431681609941_3505">Personal_Submersibles@psubs.org</a><br clear="none">> <a shape="rect" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank" id="yui_3_16_0_1_1431681609941_3506">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><div class="qtdSeparateBR"><br><br></div><div class="yqt0071424580" id="yqtfd35939"><br clear="none"><br clear="none">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"><a shape="rect" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"></div><br><br></div> </div> </div> </div></body></html>