Non-existent anchors are marked with [Invalid]. These redirects can be retargeted to the correct section or by adding an anchor to the page (e.g.
== Other related media <span id="Video games"></span>==). Incorrect redirects are sometimes caused by bots fixing double redirects.
Electromagnetic_thrusters is very similar
Viewing 18 redirects208 anchor found in Ion thruster of which 100 were not produced by cite.php