<div dir="ltr">Hi Dirk,<br><div><div class="gmail_extra"><br></div><div class="gmail_extra">In playing with imperial units, I've come across a unit conversion + rounding bug.  And you have too.<br></div><div class="gmail_extra"><br><div class="gmail_quote">On 5 July 2015 at 00:30, Dirk Hohndel <span dir="ltr"><<a href="mailto:dirk@hohndel.org" target="_blank">dirk@hohndel.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word"><span style="font-weight:600">Subsurface dive plan</span><br><div><div style="margin:0px">based on GFlow = 100 and GFhigh = 100</div><div style="margin:0px"><br></div><div style="margin:0px"><br></div>
<table style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px" border="0" cellpadding="0" cellspacing="2"><thead>
<tr>
<td><div style="margin:0px"><span style="font-weight:600">depth</span></div></td>
<td style="padding-left:10"><div style="margin:0px"><span style="font-weight:600">runtime</span></div></td>
<td style="padding-left:10"><div style="margin:0px"><span style="font-weight:600">duration</span></div></td>
<td style="padding-left:10"><div style="margin:0px"><span style="font-weight:600">gas</span></div></td></tr></thead>
<tbody><tr>
<td style="padding-left:10"><div style="margin:0px">260ft</div></td>
<td style="padding-left:10"><div style="margin:0px">3min</div></td>
<td style="padding-left:10"><div style="margin:0px">3min</div></td>
<td style="padding-left:10"><div style="margin:0px"><span style="font-weight:600;color:#ff0000">(15/45)</span></div></td></tr>
<tr>
<td style="padding-left:10"><div style="margin:0px">260ft</div></td>
<td style="padding-left:10"><div style="margin:0px">33min</div></td>
<td style="padding-left:10"><div style="margin:0px">30min</div></td>
<td><p style="margin:0px"> </p></td></tr>
<tr>
<td style="padding-left:10"><div style="margin:0px">100ft</div></td>
<td style="padding-left:10"><div style="margin:0px">39min</div></td>
<td style="padding-left:10"><div style="margin:0px">6min</div></td>
<td style="padding-left:10"><div style="margin:0px"><span style="font-weight:600;color:#ff0000">EAN38</span></div></td></tr>
<tr>
<td style="padding-left:10"><div style="margin:0px">89ft</div></td>
<td style="padding-left:10"><div style="margin:0px">41min</div></td>
<td style="padding-left:10"><div style="margin:0px">2min</div></td>
<td><p style="margin:0px"> </p></td></tr>
<tr>
<td style="padding-left:10"><div style="margin:0px">79ft</div></td>
<td style="padding-left:10"><div style="margin:0px">44min</div></td>
<td style="padding-left:10"><div style="margin:0px">2min</div></td>
<td><p style="margin:0px"> </p></td></tr>
<tr>
<td style="padding-left:10"><div style="margin:0px">69ft</div></td>
<td style="padding-left:10"><div style="margin:0px">47min</div></td>
<td style="padding-left:10"><div style="margin:0px">3min</div></td>
<td><p style="margin:0px"> </p></td></tr>
<tr>
<td style="padding-left:10"><div style="margin:0px">59ft</div></td>
<td style="padding-left:10"><div style="margin:0px">51min</div></td>
<td style="padding-left:10"><div style="margin:0px">4min</div></td>
<td><p style="margin:0px"> </p></td></tr>
<tr>
<td style="padding-left:10"><div style="margin:0px">49ft</div></td>
<td style="padding-left:10"><div style="margin:0px">58min</div></td>
<td style="padding-left:10"><div style="margin:0px">6min</div></td>
<td><p style="margin:0px"> </p></td></tr>
<tr>
<td style="padding-left:10"><div style="margin:0px">39ft</div></td>
<td style="padding-left:10"><div style="margin:0px">66min</div></td>
<td style="padding-left:10"><div style="margin:0px">8min</div></td>
<td><p style="margin:0px"> </p></td></tr>
<tr>
<td style="padding-left:10"><div style="margin:0px">30ft</div></td>
<td style="padding-left:10"><div style="margin:0px">80min</div></td>
<td style="padding-left:10"><div style="margin:0px">14min</div></td>
<td><p style="margin:0px"> </p></td></tr>
<tr>
<td style="padding-left:10"><div style="margin:0px">20ft</div></td>
<td style="padding-left:10"><div style="margin:0px">100min</div></td>
<td style="padding-left:10"><div style="margin:0px">19min</div></td>
<td><p style="margin:0px"> </p></td></tr>
<tr>
<td style="padding-left:10"><div style="margin:0px">10ft</div></td>
<td style="padding-left:10"><div style="margin:0px">102min</div></td>
<td style="padding-left:10"><div style="margin:0px">2min</div></td>
<td></td></tr>
<tr>
<td style="padding-left:10"><div style="margin:0px">10ft</div></td>
<td style="padding-left:10"><div style="margin:0px">128min</div></td>
<td style="padding-left:10"><div style="margin:0px">26min</div></td>
<td style="padding-left:10"><div style="margin:0px"><span style="font-weight:600;color:#ff0000">oxygen</span></div></td></tr>
<tr>
<td style="padding-left:10"><div style="margin:0px">0ft</div></td>
<td style="padding-left:10"><div style="margin:0px">129min</div></td>
<td style="padding-left:10"><div style="margin:0px">1min</div></td>
<td><p style="margin:0px"> </p></td></tr></tbody></table><div style="margin:0px"><br></div></div></div></blockquote><div>We calculate the MOD of oxygen as 10ft, rather than 20ft.  Using metres, we correctly calculate 6m.  Perhaps the simplest fix would be changing the default max pO2 to 1.61, otherwise we could relax the MOD calc.<br></div><div> <br></div><div>In any case, for comparing calculated imperial profiles, we should make sure we set the MOD of oxygen to 20ft.<br></div></div></div></div></div>