<html xmlns="http://www.w3.org/1999/xhtml" xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office"><head><!--[if gte mso 9]><xml><o:OfficeDocumentSettings><o:AllowPNG/><o:PixelsPerInch>96</o:PixelsPerInch></o:OfficeDocumentSettings></xml><![endif]--></head><body><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_1558393766060_18320"><span id="yui_3_16_0_ym19_1_1558393766060_19676">Pretty dry reading but...note that in salt water 2.4ghz is essentially useless. </span></div><div id="yui_3_16_0_ym19_1_1558393766060_18320"><span><br></span></div><div id="yui_3_16_0_ym19_1_1558393766060_18320" dir="ltr"><span id="yui_3_16_0_ym19_1_1558393766060_19613"><a href="https://www.mdpi.com/1424-8220/16/6/890/pdf" id="yui_3_16_0_ym19_1_1558393766060_19612">https://www.mdpi.com/1424-8220/16/6/890/pdf</a><br></span></div><div id="yui_3_16_0_ym19_1_1558393766060_18320" dir="ltr"><br></div><div id="yui_3_16_0_ym19_1_1558393766060_18320" dir="ltr"><a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3355409/" id="yui_3_16_0_ym19_1_1558393766060_19663" class="enhancr2_a039a0cf-bf49-9162-087b-cd74c959eae6">Underwater Wireless Sensor Communications in the 2.4 GHz ISM Frequency Band</a><br></div><div id="yui_3_16_0_ym19_1_1558393766060_19790"><br></div><div id="enhancr2_a039a0cf-bf49-9162-087b-cd74c959eae6" class="yahoo-link-enhancr-card  ymail-preserve-class ymail-preserve-style" style="max-width:400px;font-family:'Helvetica Neue', Helvetica, Arial, sans-serif;" contenteditable="false" data-url="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3355409/" data-type="yenhancr" data-category="article" data-embed-url="" data-size="medium" dir="ltr"> <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3355409/" style="text-decoration:none !important; color: #000 !important;" class="yahoo-enhancr-cardlink" target="_blank" rel="noreferrer" id="yui_3_16_0_ym19_1_1558393766060_19808"> <table class="card-wrapper yahoo-ignore-table" cellpadding="0" cellspacing="0" border="0" style="max-width:400px;" id="yui_3_16_0_ym19_1_1558393766060_19807"> <tbody id="yui_3_16_0_ym19_1_1558393766060_19806"><tr id="yui_3_16_0_ym19_1_1558393766060_19805"> <td width="400" id="yui_3_16_0_ym19_1_1558393766060_19804"> <table class="card yahoo-ignore-table" cellpadding="0" cellspacing="0" border="0" width="100%" style="max-width:400px;" id="yui_3_16_0_ym19_1_1558393766060_19803"> <tbody id="yui_3_16_0_ym19_1_1558393766060_19802"><tr> <td class="card-primary-image-cell" style="background:#000 url('https://s.yimg.com/vv//api/res/1.2/d3KYHU8U_ObMES9GsB7xpA--~A/YXBwaWQ9bWFpbDtmaT1maWxsO2g9MjAwO3c9NDAw/https://www.ncbi.nlm.nih.gov/corehtml/pmc/pmcgifs/pmc-logo-share.png.cf.jpg') no-repeat center center;background-size:cover;height:200px;position:relative;" background="https://s.yimg.com/vv//api/res/1.2/d3KYHU8U_ObMES9GsB7xpA--~A/YXBwaWQ9bWFpbDtmaT1maWxsO2g9MjAwO3c9NDAw/https://www.ncbi.nlm.nih.gov/corehtml/pmc/pmcgifs/pmc-logo-share.png.cf.jpg" bgcolor="#000000" valign="top"> <!--[if gte mso 9]><v:rect fill="true" stroke="false" style="width:400px;height:218px;position:absolute;top:0;left:0;"><v:fill type="frame" color="#000000" src="https://s.yimg.com/vv//api/res/1.2/d3KYHU8U_ObMES9GsB7xpA--~A/YXBwaWQ9bWFpbDtmaT1maWxsO2g9MjAwO3c9NDAw/https://www.ncbi.nlm.nih.gov/corehtml/pmc/pmcgifs/pmc-logo-share.png.cf.jpg"/></v:rect><![endif]--> <table class="yahoo-ignore-table" cellpadding="0" cellspacing="0" border="0" valign="top" style="width:100%;"> <tbody><tr> <td style="background:transparent url('https://s.yimg.com/nq/storm/assets/enhancrV2/12/overlay-tile.png') repeat left top;height:200px;" background="https://s.yimg.com/nq/storm/assets/enhancrV2/12/overlay-tile.png" bgcolor="transparent" valign="top"> <!--[if gte mso 9]><v:rect fill="true" stroke="false" style="width:400px;height:218px;position:absolute;top:-18px;left:0;"><v:fill type="pattern" color="#000000" src="https://s.yimg.com/nq/storm/assets/enhancrV2/12/overlay-tile.png"/><v:textbox inset="0,0,20px,0"><![endif]--> <table class="yahoo-ignore-table" height="185" style="width:100%;height:185px;min-height:185px;"> <tbody><tr> <td class="card-richInfo2" style="text-align:left;text-align:left;padding:15px 0 0 15px;vertical-align:top;">  </td> <td class="card-actions" style="text-align:right;padding:15px 15px 0 0;vertical-align:top;"> <div class="card-share-container"></div> </td> </tr> </tbody></table> <!--[if gte mso 9]></v:textbox></v:rect><![endif]--> </td> </tr> </tbody></table> </td> </tr> <tr id="yui_3_16_0_ym19_1_1558393766060_19801"> <td id="yui_3_16_0_ym19_1_1558393766060_19800"> <table class="card-info yahoo-ignore-table" align="center" cellpadding="0" cellspacing="0" border="0" style="background:#fff;position:relative;z-index:2;width:95%;max-width:380px;border:1px solid #e0e4e9;border-bottom:3px solid #000000;margin-top:-40px;margin-left:auto;margin-right:auto;" id="yui_3_16_0_ym19_1_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