var fDesc=new Array(); fDesc[0] = "Chart Trainer -Learn to read nautical charts like an expert.
Chart Trainer is designed to help mariners interpret nautical charts and use them more efficiently, both traditional paper charts and new digital charts for computers. The materials cover all aspects of nautical charts in the most detail available, including tutorials on chart reading and plotting, along with the official definitions of all nautical chart symbols and plain-language explanations of chart features and conventions."; function tShowHide(id, show) { var s = document.getElementById("desc"); if ((s.innerHTML.length<=212 || show==1) && show!=2) { s.innerHTML = fDesc[id]; if (document.getElementById('m1')) document.getElementById('m1').style.display='none'; if (document.getElementById('m2')) document.getElementById('m2').style.display='none'; if (document.getElementById('more_txt')) document.getElementById('more_txt').style.display='inline'; } else { s.innerHTML = ''; } }