I am trying to apply a FontAwesome icon to a check box but only certain icons are appearing while others are not.
The icon I want to appear is the ship icon. I am able to make it work inside a div using <i class="fas fa-ship"></i> but when trying to make it appear via CSS it is not showing up - yet other icons do.
Not Working
@import url('https://use.fontawesome.com/releases/v5.0.9/css/all.css');
input[type=radio].with-font,
input[type=checkbox].with-font {
    border: 0;
    clip: rect(0 0 0 0);
    height: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute;
    width: 1px;
}
input[type=radio].with-font ~ label:before,
input[type=checkbox].with-font ~ label:before {
    font-family: FontAwesome;
    display: inline-block;
    content: "\f042";
    letter-spacing: 10px;
    font-size: 1.2em;
    color: #535353;
    width: 1.4em;
}
Working (Airplane)
@import url(//netdna.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.css);
input[type=radio].with-font,
input[type=checkbox].with-font {
    border: 0;
    clip: rect(0 0 0 0);
    height: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute;
    width: 1px;
}
input[type=radio].with-font ~ label:before,
input[type=checkbox].with-font ~ label:before {
    font-family: FontAwesome;
    display: inline-block;
    content: "\f072";
    letter-spacing: 10px;
    font-size: 1.2em;
    color: #535353;
    width: 1.4em;
}
I did verify that the ship icon is a free icon so not sure why it is not working via CSS.