diff --git a/LTAPI.h b/LTAPI.h
index 48fd203..d55f39a 100644
--- a/LTAPI.h
+++ b/LTAPI.h
@@ -122,7 +122,7 @@ class LTAPIAircraft
             bool        bcn        : 1;     ///< beacon light
             bool        strb       : 1;     ///< strobe light
             bool        nav        : 1;     ///< navigaton lights
-            bool        hidden     : 1;     ///< aircraft _not_ visible?
+            unsigned    hidden     : 1;     ///< aircraft _not_ visible? (remains an 'unsigned' for backward compatibility)
             bool        camera     : 1;     ///< is LiveTraffic's camera on this aircraft?
             // Misc
             int         multiIdx    : 8;    ///< multiplayer index if plane reported via sim/multiplayer/position dataRefs, 0 if not
@@ -283,7 +283,7 @@ class LTAPIAircraft
     /// @param[out] y Local y coordinate
     /// @param[out] z Local z coordinate
     void            getLocalCoord (double& x, double& y, double& z) const
-    { XPLMWorldToLocal(bulk.lat,bulk.lon,bulk.alt_ft, &x,&y,&z); }
+    { XPLMWorldToLocal(bulk.lat,bulk.lon,bulk.alt_ft*0.3048, &x,&y,&z); }
 
 public:
     /// @brief Standard object creation callback.
diff --git a/docs/html/LTAPI_8h.html b/docs/html/LTAPI_8h.html
index 0c263c2..d159040 100644
--- a/docs/html/LTAPI_8h.html
+++ b/docs/html/LTAPI_8h.html
@@ -175,11 +175,11 @@ <h2 class="memtitle"><span class="permalink"><a href="#structLTAPIAircraft_1_1LT
 <td class="fielddoc">
 </td></tr>
 <tr><td class="fieldtype">
-<a id="a8e3f14c561f2bbfea953cb499bb8f657" name="a8e3f14c561f2bbfea953cb499bb8f657"></a>bool</td>
+<a id="a0897daabfa3e6b21e59c60c9c172ed88" name="a0897daabfa3e6b21e59c60c9c172ed88"></a>unsigned</td>
 <td class="fieldname">
 hidden: 1</td>
 <td class="fielddoc">
-aircraft <em>not</em> visible? </td></tr>
+aircraft <em>not</em> visible? (remains an 'unsigned' for backward compatibility) </td></tr>
 <tr><td class="fieldtype">
 <a id="aaac4f571b52733b4edeb63dbe6474187" name="aaac4f571b52733b4edeb63dbe6474187"></a>bool</td>
 <td class="fieldname">
diff --git a/docs/html/LTAPI_8h_source.html b/docs/html/LTAPI_8h_source.html
index 16aa371..9a0004e 100644
--- a/docs/html/LTAPI_8h_source.html
+++ b/docs/html/LTAPI_8h_source.html
@@ -144,7 +144,7 @@
 <div class="line"><a id="l00122" name="l00122"></a><span class="lineno"><a class="line" href="structLTAPIAircraft_1_1LTAPIBulkData.html#aeb66d3bd7df3a175702591196a25f344">  122</a></span>            <span class="keywordtype">bool</span>        <a class="code hl_variable" href="structLTAPIAircraft_1_1LTAPIBulkData.html#aeb66d3bd7df3a175702591196a25f344">bcn</a>        : 1;     </div>
 <div class="line"><a id="l00123" name="l00123"></a><span class="lineno"><a class="line" href="structLTAPIAircraft_1_1LTAPIBulkData.html#a916718122b12c18e111cc761909c0321">  123</a></span>            <span class="keywordtype">bool</span>        <a class="code hl_variable" href="structLTAPIAircraft_1_1LTAPIBulkData.html#a916718122b12c18e111cc761909c0321">strb</a>       : 1;     </div>
 <div class="line"><a id="l00124" name="l00124"></a><span class="lineno"><a class="line" href="structLTAPIAircraft_1_1LTAPIBulkData.html#ab2e647e53014efb68d8d0a7bb70a7f00">  124</a></span>            <span class="keywordtype">bool</span>        <a class="code hl_variable" href="structLTAPIAircraft_1_1LTAPIBulkData.html#ab2e647e53014efb68d8d0a7bb70a7f00">nav</a>        : 1;     </div>
-<div class="line"><a id="l00125" name="l00125"></a><span class="lineno"><a class="line" href="structLTAPIAircraft_1_1LTAPIBulkData.html#a8e3f14c561f2bbfea953cb499bb8f657">  125</a></span>            <span class="keywordtype">bool</span>        <a class="code hl_variable" href="structLTAPIAircraft_1_1LTAPIBulkData.html#a8e3f14c561f2bbfea953cb499bb8f657">hidden</a>     : 1;     </div>
+<div class="line"><a id="l00125" name="l00125"></a><span class="lineno"><a class="line" href="structLTAPIAircraft_1_1LTAPIBulkData.html#a0897daabfa3e6b21e59c60c9c172ed88">  125</a></span>            <span class="keywordtype">unsigned</span>    <a class="code hl_variable" href="structLTAPIAircraft_1_1LTAPIBulkData.html#a0897daabfa3e6b21e59c60c9c172ed88">hidden</a>     : 1;     </div>
 <div class="line"><a id="l00126" name="l00126"></a><span class="lineno"><a class="line" href="structLTAPIAircraft_1_1LTAPIBulkData.html#a744dd94b77cd13bccf61f9ea589bfb10">  126</a></span>            <span class="keywordtype">bool</span>        <a class="code hl_variable" href="structLTAPIAircraft_1_1LTAPIBulkData.html#a744dd94b77cd13bccf61f9ea589bfb10">camera</a>     : 1;     </div>
 <div class="line"><a id="l00127" name="l00127"></a><span class="lineno">  127</span>            <span class="comment">// Misc</span></div>
 <div class="line"><a id="l00128" name="l00128"></a><span class="lineno"><a class="line" href="structLTAPIAircraft_1_1LTAPIBulkData.html#ac43647927d1ffea8d76c2d3b21f353e9">  128</a></span>            <span class="keywordtype">int</span>         <a class="code hl_variable" href="structLTAPIAircraft_1_1LTAPIBulkData.html#ac43647927d1ffea8d76c2d3b21f353e9">multiIdx</a>    : 8;    </div>
@@ -311,7 +311,7 @@
 <div class="line"><a id="l00265" name="l00265"></a><span class="lineno"><a class="line" href="classLTAPIAircraft.html#a1c2f4bbf0a8cd7c0312593bc685f0e9f">  265</a></span>    <a class="code hl_enumeration" href="classLTAPIAircraft.html#a8c5d6cf4dc04f8a00e85d9f35a4399e7">LTFlightPhase</a>   <a class="code hl_function" href="classLTAPIAircraft.html#a1c2f4bbf0a8cd7c0312593bc685f0e9f">getPhase</a>()<span class="keyword">          const </span>{ <span class="keywordflow">return</span> <a class="code hl_variable" href="classLTAPIAircraft.html#abcabbf4a89f07860b3d6f386f6f5e698">bulk</a>.<a class="code hl_variable" href="structLTAPIAircraft_1_1LTAPIBulkData.html#aa3b1f400755a76d6ecb77488a9dbed84">bits</a>.<a class="code hl_variable" href="structLTAPIAircraft_1_1LTAPIBulkData.html#a07e6d35a16e751eda56b12a4ba96162c">phase</a>; }       </div>
 <div class="foldopen" id="foldopen00266" data-start="{" data-end="}">
 <div class="line"><a id="l00266" name="l00266"></a><span class="lineno"><a class="line" href="classLTAPIAircraft.html#a1f53a929d3251ba1955959d0da239ff7">  266</a></span>    std::string     <a class="code hl_function" href="classLTAPIAircraft.html#a1f53a929d3251ba1955959d0da239ff7">getPhaseStr</a>()       <span class="keyword">const</span>;                                  </div>
-<div class="line"><a id="l00267" name="l00267"></a><span class="lineno"><a class="line" href="classLTAPIAircraft.html#a56dd32809b57b7f9ee87238d4c375404">  267</a></span>    <span class="keywordtype">bool</span>            <a class="code hl_function" href="classLTAPIAircraft.html#a56dd32809b57b7f9ee87238d4c375404">isVisible</a>()<span class="keyword">         const </span>{ <span class="keywordflow">return</span> !<a class="code hl_variable" href="classLTAPIAircraft.html#abcabbf4a89f07860b3d6f386f6f5e698">bulk</a>.<a class="code hl_variable" href="structLTAPIAircraft_1_1LTAPIBulkData.html#aa3b1f400755a76d6ecb77488a9dbed84">bits</a>.<a class="code hl_variable" href="structLTAPIAircraft_1_1LTAPIBulkData.html#a8e3f14c561f2bbfea953cb499bb8f657">hidden</a>; }     </div>
+<div class="line"><a id="l00267" name="l00267"></a><span class="lineno"><a class="line" href="classLTAPIAircraft.html#a56dd32809b57b7f9ee87238d4c375404">  267</a></span>    <span class="keywordtype">bool</span>            <a class="code hl_function" href="classLTAPIAircraft.html#a56dd32809b57b7f9ee87238d4c375404">isVisible</a>()<span class="keyword">         const </span>{ <span class="keywordflow">return</span> !<a class="code hl_variable" href="classLTAPIAircraft.html#abcabbf4a89f07860b3d6f386f6f5e698">bulk</a>.<a class="code hl_variable" href="structLTAPIAircraft_1_1LTAPIBulkData.html#aa3b1f400755a76d6ecb77488a9dbed84">bits</a>.<a class="code hl_variable" href="structLTAPIAircraft_1_1LTAPIBulkData.html#a0897daabfa3e6b21e59c60c9c172ed88">hidden</a>; }     </div>
 <div class="line"><a id="l00268" name="l00268"></a><span class="lineno">  268</span>    <span class="comment">// configuration</span></div>
 <div class="foldopen" id="foldopen00269" data-start="{" data-end="}">
 <div class="line"><a id="l00269" name="l00269"></a><span class="lineno"><a class="line" href="classLTAPIAircraft.html#a10673ee8977d08c40e37f347cb890da7">  269</a></span>    <span class="keywordtype">float</span>           <a class="code hl_function" href="classLTAPIAircraft.html#a10673ee8977d08c40e37f347cb890da7">getFlaps</a>()<span class="keyword">          const </span>{ <span class="keywordflow">return</span> <a class="code hl_variable" href="classLTAPIAircraft.html#abcabbf4a89f07860b3d6f386f6f5e698">bulk</a>.<a class="code hl_variable" href="structLTAPIAircraft_1_1LTAPIBulkData.html#a700f08a757207e88257abe473bf68897">flaps</a>; }            </div>
@@ -334,7 +334,7 @@
 <div class="line"><a id="l00279" name="l00279"></a><span class="lineno">  279</span>    <span class="comment">// calculated</span></div>
 <div class="foldopen" id="foldopen00285" data-start="{" data-end="}">
 <div class="line"><a id="l00285" name="l00285"></a><span class="lineno"><a class="line" href="classLTAPIAircraft.html#a40e4cae485af781565ec94a76732e794">  285</a></span>    <span class="keywordtype">void</span>            <a class="code hl_function" href="classLTAPIAircraft.html#a40e4cae485af781565ec94a76732e794">getLocalCoord</a> (<span class="keywordtype">double</span>&amp; x, <span class="keywordtype">double</span>&amp; y, <span class="keywordtype">double</span>&amp; z)<span class="keyword"> const</span></div>
-<div class="line"><a id="l00286" name="l00286"></a><span class="lineno">  286</span><span class="keyword">    </span>{ XPLMWorldToLocal(<a class="code hl_variable" href="classLTAPIAircraft.html#abcabbf4a89f07860b3d6f386f6f5e698">bulk</a>.<a class="code hl_variable" href="structLTAPIAircraft_1_1LTAPIBulkData.html#a310cc40dc0f36883b11a28ba3b5e39ee">lat</a>,<a class="code hl_variable" href="classLTAPIAircraft.html#abcabbf4a89f07860b3d6f386f6f5e698">bulk</a>.<a class="code hl_variable" href="structLTAPIAircraft_1_1LTAPIBulkData.html#afd7bafc45f3422afb741894e414593cd">lon</a>,<a class="code hl_variable" href="classLTAPIAircraft.html#abcabbf4a89f07860b3d6f386f6f5e698">bulk</a>.<a class="code hl_variable" href="structLTAPIAircraft_1_1LTAPIBulkData.html#a9b133343b13d3228c73258fa0815cb34">alt_ft</a>, &amp;x,&amp;y,&amp;z); }</div>
+<div class="line"><a id="l00286" name="l00286"></a><span class="lineno">  286</span><span class="keyword">    </span>{ XPLMWorldToLocal(<a class="code hl_variable" href="classLTAPIAircraft.html#abcabbf4a89f07860b3d6f386f6f5e698">bulk</a>.<a class="code hl_variable" href="structLTAPIAircraft_1_1LTAPIBulkData.html#a310cc40dc0f36883b11a28ba3b5e39ee">lat</a>,<a class="code hl_variable" href="classLTAPIAircraft.html#abcabbf4a89f07860b3d6f386f6f5e698">bulk</a>.<a class="code hl_variable" href="structLTAPIAircraft_1_1LTAPIBulkData.html#afd7bafc45f3422afb741894e414593cd">lon</a>,<a class="code hl_variable" href="classLTAPIAircraft.html#abcabbf4a89f07860b3d6f386f6f5e698">bulk</a>.<a class="code hl_variable" href="structLTAPIAircraft_1_1LTAPIBulkData.html#a9b133343b13d3228c73258fa0815cb34">alt_ft</a>*0.3048, &amp;x,&amp;y,&amp;z); }</div>
 </div>
 <div class="line"><a id="l00287" name="l00287"></a><span class="lineno">  287</span> </div>
 <div class="line"><a id="l00288" name="l00288"></a><span class="lineno">  288</span><span class="keyword">public</span>:</div>
@@ -623,6 +623,7 @@
 <div class="ttc" id="aclassLTDataRef_html_aef192a5e5f899333b88d7a276ce03abb"><div class="ttname"><a href="classLTDataRef.html#aef192a5e5f899333b88d7a276ce03abb">LTDataRef::getFloat</a></div><div class="ttdeci">float getFloat()</div><div class="ttdoc">Get dataRef's float value. Silently returns 0.0f if dataRef doesn't exist.</div></div>
 <div class="ttc" id="astructLTAPIAircraft_1_1LTAPIBulkData_html"><div class="ttname"><a href="structLTAPIAircraft_1_1LTAPIBulkData.html">LTAPIAircraft::LTAPIBulkData</a></div><div class="ttdoc">Bulk data transfer structur for communication with LTAPI.</div><div class="ttdef"><b>Definition</b> LTAPI.h:92</div></div>
 <div class="ttc" id="astructLTAPIAircraft_1_1LTAPIBulkData_html_a07e6d35a16e751eda56b12a4ba96162c"><div class="ttname"><a href="structLTAPIAircraft_1_1LTAPIBulkData.html#a07e6d35a16e751eda56b12a4ba96162c">LTAPIAircraft::LTAPIBulkData::BulkBitsTy::phase</a></div><div class="ttdeci">LTFlightPhase phase</div><div class="ttdoc">flight phase, see LTAircraft::FlightPhase</div><div class="ttdef"><b>Definition</b> LTAPI.h:117</div></div>
+<div class="ttc" id="astructLTAPIAircraft_1_1LTAPIBulkData_html_a0897daabfa3e6b21e59c60c9c172ed88"><div class="ttname"><a href="structLTAPIAircraft_1_1LTAPIBulkData.html#a0897daabfa3e6b21e59c60c9c172ed88">LTAPIAircraft::LTAPIBulkData::BulkBitsTy::hidden</a></div><div class="ttdeci">unsigned hidden</div><div class="ttdoc">aircraft not visible? (remains an 'unsigned' for backward compatibility)</div><div class="ttdef"><b>Definition</b> LTAPI.h:125</div></div>
 <div class="ttc" id="astructLTAPIAircraft_1_1LTAPIBulkData_html_a0cce19816e4370993af78512e59c5b9e"><div class="ttname"><a href="structLTAPIAircraft_1_1LTAPIBulkData.html#a0cce19816e4370993af78512e59c5b9e">LTAPIAircraft::LTAPIBulkData::alt_ft_f</a></div><div class="ttdeci">float alt_ft_f</div><div class="ttdoc">deprecated: [ft] altitude</div><div class="ttdef"><b>Definition</b> LTAPI.h:99</div></div>
 <div class="ttc" id="astructLTAPIAircraft_1_1LTAPIBulkData_html_a11d78fd6ba72a36e17454c514327536b"><div class="ttname"><a href="structLTAPIAircraft_1_1LTAPIBulkData.html#a11d78fd6ba72a36e17454c514327536b">LTAPIAircraft::LTAPIBulkData::track</a></div><div class="ttdeci">float track</div><div class="ttdoc">[°] track over ground</div><div class="ttdef"><b>Definition</b> LTAPI.h:101</div></div>
 <div class="ttc" id="astructLTAPIAircraft_1_1LTAPIBulkData_html_a1992c2592483a37dab2ba895728c6c5b"><div class="ttname"><a href="structLTAPIAircraft_1_1LTAPIBulkData.html#a1992c2592483a37dab2ba895728c6c5b">LTAPIAircraft::LTAPIBulkData::gear</a></div><div class="ttdeci">float gear</div><div class="ttdoc">gear position: 0.0 retracted, 1.0 fully extended</div><div class="ttdef"><b>Definition</b> LTAPI.h:110</div></div>
@@ -639,7 +640,6 @@
 <div class="ttc" id="astructLTAPIAircraft_1_1LTAPIBulkData_html_a70c4d66376da79e6ba1c05b31c9cb03c"><div class="ttname"><a href="structLTAPIAircraft_1_1LTAPIBulkData.html#a70c4d66376da79e6ba1c05b31c9cb03c">LTAPIAircraft::LTAPIBulkData::LTAPIBulkData</a></div><div class="ttdeci">LTAPIBulkData()</div><div class="ttdoc">Constructor initializes some data without defaults.</div><div class="ttdef"><b>Definition</b> LTAPI.h:141</div></div>
 <div class="ttc" id="astructLTAPIAircraft_1_1LTAPIBulkData_html_a732c4d9fdff1a6dbd8364d7ea1651259"><div class="ttname"><a href="structLTAPIAircraft_1_1LTAPIBulkData.html#a732c4d9fdff1a6dbd8364d7ea1651259">LTAPIAircraft::LTAPIBulkData::heading</a></div><div class="ttdeci">float heading</div><div class="ttdoc">[°] heading</div><div class="ttdef"><b>Definition</b> LTAPI.h:100</div></div>
 <div class="ttc" id="astructLTAPIAircraft_1_1LTAPIBulkData_html_a744dd94b77cd13bccf61f9ea589bfb10"><div class="ttname"><a href="structLTAPIAircraft_1_1LTAPIBulkData.html#a744dd94b77cd13bccf61f9ea589bfb10">LTAPIAircraft::LTAPIBulkData::BulkBitsTy::camera</a></div><div class="ttdeci">bool camera</div><div class="ttdoc">is LiveTraffic's camera on this aircraft?</div><div class="ttdef"><b>Definition</b> LTAPI.h:126</div></div>
-<div class="ttc" id="astructLTAPIAircraft_1_1LTAPIBulkData_html_a8e3f14c561f2bbfea953cb499bb8f657"><div class="ttname"><a href="structLTAPIAircraft_1_1LTAPIBulkData.html#a8e3f14c561f2bbfea953cb499bb8f657">LTAPIAircraft::LTAPIBulkData::BulkBitsTy::hidden</a></div><div class="ttdeci">bool hidden</div><div class="ttdoc">aircraft not visible?</div><div class="ttdef"><b>Definition</b> LTAPI.h:125</div></div>
 <div class="ttc" id="astructLTAPIAircraft_1_1LTAPIBulkData_html_a916718122b12c18e111cc761909c0321"><div class="ttname"><a href="structLTAPIAircraft_1_1LTAPIBulkData.html#a916718122b12c18e111cc761909c0321">LTAPIAircraft::LTAPIBulkData::BulkBitsTy::strb</a></div><div class="ttdeci">bool strb</div><div class="ttdoc">strobe light</div><div class="ttdef"><b>Definition</b> LTAPI.h:123</div></div>
 <div class="ttc" id="astructLTAPIAircraft_1_1LTAPIBulkData_html_a98c215be414303ec798f21553df09245"><div class="ttname"><a href="structLTAPIAircraft_1_1LTAPIBulkData.html#a98c215be414303ec798f21553df09245">LTAPIAircraft::LTAPIBulkData::vsi_ft</a></div><div class="ttdeci">float vsi_ft</div><div class="ttdoc">[ft/minute] vertical speed, positive up</div><div class="ttdef"><b>Definition</b> LTAPI.h:105</div></div>
 <div class="ttc" id="astructLTAPIAircraft_1_1LTAPIBulkData_html_a9b133343b13d3228c73258fa0815cb34"><div class="ttname"><a href="structLTAPIAircraft_1_1LTAPIBulkData.html#a9b133343b13d3228c73258fa0815cb34">LTAPIAircraft::LTAPIBulkData::alt_ft</a></div><div class="ttdeci">double alt_ft</div><div class="ttdoc">[ft] altitude</div><div class="ttdef"><b>Definition</b> LTAPI.h:137</div></div>
diff --git a/docs/html/doxygen_crawl.html b/docs/html/doxygen_crawl.html
index 4ff909c..d18e800 100644
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+++ b/docs/html/doxygen_crawl.html
@@ -258,6 +258,7 @@
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+<a href="structLTAPIAircraft_1_1LTAPIBulkData.html#a0897daabfa3e6b21e59c60c9c172ed88"/>
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@@ -274,7 +275,6 @@
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diff --git a/docs/html/functions.html b/docs/html/functions.html
index fe11427..8160ce3 100644
--- a/docs/html/functions.html
+++ b/docs/html/functions.html
@@ -186,7 +186,7 @@ <h3><a id="index_h" name="index_h"></a>- h -</h3><ul>
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 <li>height_ft&#160;:&#160;<a class="el" href="structLTAPIAircraft_1_1LTAPIBulkData.html#a461793a3cc7c51902b617cd8a03fc311">LTAPIAircraft::LTAPIBulkData</a></li>
-<li>hidden&#160;:&#160;<a class="el" href="structLTAPIAircraft_1_1LTAPIBulkData.html#a8e3f14c561f2bbfea953cb499bb8f657">LTAPIAircraft::LTAPIBulkData::BulkBitsTy</a></li>
+<li>hidden&#160;:&#160;<a class="el" href="structLTAPIAircraft_1_1LTAPIBulkData.html#a0897daabfa3e6b21e59c60c9c172ed88">LTAPIAircraft::LTAPIBulkData::BulkBitsTy</a></li>
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diff --git a/docs/html/functions_vars.html b/docs/html/functions_vars.html
index 170e5ea..b1b547e 100644
--- a/docs/html/functions_vars.html
+++ b/docs/html/functions_vars.html
@@ -106,7 +106,7 @@ <h3><a id="index_g" name="index_g"></a>- g -</h3><ul>
 <h3><a id="index_h" name="index_h"></a>- h -</h3><ul>
 <li>heading&#160;:&#160;<a class="el" href="structLTAPIAircraft_1_1LTAPIBulkData.html#a732c4d9fdff1a6dbd8364d7ea1651259">LTAPIAircraft::LTAPIBulkData</a></li>
 <li>height_ft&#160;:&#160;<a class="el" href="structLTAPIAircraft_1_1LTAPIBulkData.html#a461793a3cc7c51902b617cd8a03fc311">LTAPIAircraft::LTAPIBulkData</a></li>
-<li>hidden&#160;:&#160;<a class="el" href="structLTAPIAircraft_1_1LTAPIBulkData.html#a8e3f14c561f2bbfea953cb499bb8f657">LTAPIAircraft::LTAPIBulkData::BulkBitsTy</a></li>
+<li>hidden&#160;:&#160;<a class="el" href="structLTAPIAircraft_1_1LTAPIBulkData.html#a0897daabfa3e6b21e59c60c9c172ed88">LTAPIAircraft::LTAPIBulkData::BulkBitsTy</a></li>
 </ul>
 
 
diff --git a/docs/html/structLTAPIAircraft_1_1LTAPIBulkData.html b/docs/html/structLTAPIAircraft_1_1LTAPIBulkData.html
index 13e36c6..1458456 100644
--- a/docs/html/structLTAPIAircraft_1_1LTAPIBulkData.html
+++ b/docs/html/structLTAPIAircraft_1_1LTAPIBulkData.html
@@ -191,11 +191,11 @@ <h2 class="memtitle"><span class="permalink"><a href="#structLTAPIAircraft_1_1LT
 <td class="fielddoc">
 </td></tr>
 <tr><td class="fieldtype">
-<a id="a8e3f14c561f2bbfea953cb499bb8f657" name="a8e3f14c561f2bbfea953cb499bb8f657"></a>bool</td>
+<a id="a0897daabfa3e6b21e59c60c9c172ed88" name="a0897daabfa3e6b21e59c60c9c172ed88"></a>unsigned</td>
 <td class="fieldname">
 hidden: 1</td>
 <td class="fielddoc">
-aircraft <em>not</em> visible? </td></tr>
+aircraft <em>not</em> visible? (remains an 'unsigned' for backward compatibility) </td></tr>
 <tr><td class="fieldtype">
 <a id="aaac4f571b52733b4edeb63dbe6474187" name="aaac4f571b52733b4edeb63dbe6474187"></a>bool</td>
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