<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Jon, Hank,</div><div id="AppleMailSignature">here's a bit of info pasted below.</div><div id="AppleMailSignature">I am not sure about acrylic. You would have to attach the transducer to</div><div id="AppleMailSignature">the acrylic unless you put the transducer in a bag full of water & had this</div><div id="AppleMailSignature">forced against the acrylic. </div><div id="AppleMailSignature">Again someone could try hanging the transducer in water while pushing it </div><div id="AppleMailSignature">against a piece of acrylic.</div><div id="AppleMailSignature">Alan</div><div id="AppleMailSignature"><h3 style="box-sizing: border-box; font-weight: normal; line-height: 27px; margin-top: 5px; margin-bottom: 10px; text-shadow: none; border-top-left-radius: 0px !important; border-top-right-radius: 0px !important; border-bottom-right-radius: 0px !important; border-bottom-left-radius: 0px !important;"><font size="3"><span style="background-color: rgba(255, 255, 255, 0);">In-Hull Transducers</span></font></h3><p style="box-sizing: border-box; margin: 0.5em 0px; line-height: 1.5; padding-top: 0px; border-top-left-radius: 0px !important; border-top-right-radius: 0px !important; border-bottom-right-radius: 0px !important; border-bottom-left-radius: 0px !important;"><span style="background-color: rgba(255, 255, 255, 0);">In-hull (a.k.a. shoot-through) transducers are epoxied directly to the inside of the hull. These are only used in fiberglass hulls. In-hulls will not work with wooden, aluminum, or steel hulls, or in foam sandwich/hulls that have air pockets. Any wood, metal, or foam reinforcement must be removed from the inside of the hull.</span></p><p style="box-sizing: border-box; margin: 0.5em 0px; line-height: 1.5; padding-top: 0px; border-top-left-radius: 0px !important; border-top-right-radius: 0px !important; border-bottom-right-radius: 0px !important; border-bottom-left-radius: 0px !important;"><span style="background-color: rgba(255, 255, 255, 0);">With an in-hull transducer, the signal is transmitted and received through the hull of the boat. As a result, there is considerable loss of sonar performance.</span></p><p style="box-sizing: border-box; margin: 0.5em 0px; line-height: 1.5; padding-top: 0px; border-top-left-radius: 0px !important; border-top-right-radius: 0px !important; border-bottom-right-radius: 0px !important; border-bottom-left-radius: 0px !important;"><span style="background-color: rgba(255, 255, 255, 0);">In other words, you won't be able to read as deep or detect fish as well with an in-hull transducer as with one that's transom mounted or thru-hull mounted.</span></p><p style="box-sizing: border-box; margin: 0.5em 0px; line-height: 1.5; padding-top: 0px; border-top-left-radius: 0px !important; border-top-right-radius: 0px !important; border-bottom-right-radius: 0px !important; border-bottom-left-radius: 0px !important;"><span style="background-color: rgba(255, 255, 255, 0);">Fiberglass hulls are often reinforced in places for added strength. These cored areas contain balsa wood or structural foam, which are poor sound conductors. The transducer will need to be located where the fiberglass is solid and there are no air bubbles trapped in the fiberglass resin. You'll also want to make sure that there is no coring, flotation material, or dead air space sandwiched between the inside skin and the outer skin of the hull.</span></p><div class="col-sm-6" style="box-sizing: border-box; position: relative; min-height: 1px; padding-left: 15px; padding-right: 15px; float: left; width: 250.40625px; border-top-left-radius: 0px !important; border-top-right-radius: 0px !important; border-bottom-right-radius: 0px !important; border-bottom-left-radius: 0px !important;"><p style="box-sizing: border-box; margin: 0.5em 0px; line-height: 1.5; padding-top: 0px; border-top-left-radius: 0px !important; border-top-right-radius: 0px !important; border-bottom-right-radius: 0px !important; border-bottom-left-radius: 0px !important;"><span style="box-sizing: border-box; font-weight: 700; border-top-left-radius: 0px !important; border-top-right-radius: 0px !important; border-bottom-right-radius: 0px !important; border-bottom-left-radius: 0px !important; background-color: rgba(255, 255, 255, 0);">Advantages</span></p><ul style="box-sizing: border-box; border-top-left-radius: 0px !important; border-top-right-radius: 0px !important; border-bottom-right-radius: 0px !important; border-bottom-left-radius: 0px !important; margin-top: 0px; margin-bottom: 10px;"><li style="box-sizing: border-box; border-top-left-radius: 0px !important; border-top-right-radius: 0px !important; border-bottom-right-radius: 0px !important; border-bottom-left-radius: 0px !important;"><span style="background-color: rgba(255, 255, 255, 0);">No holes drilled in hull</span></li><li style="box-sizing: border-box; border-top-left-radius: 0px !important; border-top-right-radius: 0px !important; border-bottom-right-radius: 0px !important; border-bottom-left-radius: 0px !important;"><span style="background-color: rgba(255, 255, 255, 0);">Excellent high speed performance</span></li><li style="box-sizing: border-box; border-top-left-radius: 0px !important; border-top-right-radius: 0px !important; border-bottom-right-radius: 0px !important; border-bottom-left-radius: 0px !important;"><span style="background-color: rgba(255, 255, 255, 0);">No obstructions in the water</span></li><li style="box-sizing: border-box; border-top-left-radius: 0px !important; border-top-right-radius: 0px !important; border-bottom-right-radius: 0px !important; border-bottom-left-radius: 0px !important;"><span style="background-color: rgba(255, 255, 255, 0);">Low maintenance</span></li></ul></div><div class="col-sm-6" style="box-sizing: border-box; position: relative; min-height: 1px; padding-left: 15px; padding-right: 15px; float: left; width: 250.40625px; border-top-left-radius: 0px !important; border-top-right-radius: 0px !important; border-bottom-right-radius: 0px !important; border-bottom-left-radius: 0px !important;"><p style="box-sizing: border-box; margin: 0.5em 0px; line-height: 1.5; padding-top: 0px; border-top-left-radius: 0px !important; border-top-right-radius: 0px !important; border-bottom-right-radius: 0px !important; border-bottom-left-radius: 0px !important;"><span style="box-sizing: border-box; font-weight: 700; border-top-left-radius: 0px !important; border-top-right-radius: 0px !important; border-bottom-right-radius: 0px !important; border-bottom-left-radius: 0px !important; background-color: rgba(255, 255, 255, 0);">Disadvantages</span></p><ul style="box-sizing: border-box; margin-top: 0px; margin-bottom: 10px; border-top-left-radius: 0px !important; border-top-right-radius: 0px !important; border-bottom-right-radius: 0px !important; border-bottom-left-radius: 0px !important;"><li style="box-sizing: border-box; border-top-left-radius: 0px !important; border-top-right-radius: 0px !important; border-bottom-right-radius: 0px !important; border-bottom-left-radius: 0px !important;"><span style="background-color: rgba(255, 255, 255, 0);">Reduced maximuum depth reading</span></li><li style="box-sizing: border-box; border-top-left-radius: 0px !important; border-top-right-radius: 0px !important; border-bottom-right-radius: 0px !important; border-bottom-left-radius: 0px !important;"><span style="background-color: rgba(255, 255, 255, 0);">Reduced fish detection</span></li><li style="box-sizing: border-box; border-top-left-radius: 0px !important; border-top-right-radius: 0px !important; border-bottom-right-radius: 0px !important; border-bottom-left-radius: 0px !important;"><span style="background-color: rgba(255, 255, 255, 0);">Can only be used with fibreglass hulls</span></li></ul></div><br>Sent from my iPad</div><div><br>On 19/07/2018, at 1:52 PM, Jon Wallace via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br><br></div><blockquote type="cite"><div><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:16px"><div id="yui_3_16_0_ym19_1_1531965059710_8187"><span><br></span></div><div id="yui_3_16_0_ym19_1_1531965059710_8187"><span id="yui_3_16_0_ym19_1_1531965059710_8188">Can it shoot through acrylic?</span></div><div class="qtdSeparateBR" id="yui_3_16_0_ym19_1_1531965059710_8159"><br><br></div><div class="yahoo_quoted" id="yui_3_16_0_ym19_1_1531965059710_8194" style="display: block;"> <div style="font-family: times new roman, new york, times, serif; font-size: 16px;" id="yui_3_16_0_ym19_1_1531965059710_8193"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_ym19_1_1531965059710_8192"> <div dir="ltr" id="yui_3_16_0_ym19_1_1531965059710_8191"> <font size="2" face="Arial" id="yui_3_16_0_ym19_1_1531965059710_8190"> <hr size="1"> <b><span style="font-weight:bold;">From:</span></b> hank pronk via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br> <b><span style="font-weight: bold;">To:</span></b> Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> <br> <b id="yui_3_16_0_ym19_1_1531965059710_8196"><span style="font-weight: bold;" id="yui_3_16_0_ym19_1_1531965059710_8195">Sent:</span></b> Wednesday, July 18, 2018 6:55 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> [PSUBS-MAILIST] depth sonar<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_ym19_1_1531965059710_8197"><br><div id="yiv7909926524"><div id="yui_3_16_0_ym19_1_1531965059710_8200"><div style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;" id="yui_3_16_0_ym19_1_1531965059710_8199"><div>Hi all,</div><div id="yui_3_16_0_ym19_1_1531965059710_8198">I am looking for ideas on how to make a depth transducer survive to 3,000 feet. I am thinking about a 1 atm housing with a fibreglass bottom that the transducer can shoot through. </div><div>Alan, were you working on this idea?</div><div id="yui_3_16_0_ym19_1_1531965059710_8201">Hank</div><div style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"></div></div></div></div>_______________________________________________<br>Personal_Submersibles mailing list<br><a ymailto="mailto:Personal_Submersibles@psubs.org" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank" id="yui_3_16_0_ym19_1_1531965059710_8202">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br><br><br></div> </div> </div> </div></div></div></blockquote><blockquote type="cite"><div><span>_______________________________________________</span><br><span>Personal_Submersibles mailing list</span><br><span><a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a></span><br><span><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a></span><br></div></blockquote></body></html>