Thanks for the reply Mynok. I got that the FBD units were for rail repair but I wasn't seeing that tiny blue "RRC" text link on the unit icon to actually make them do it. The scales have fallen from my eyes Thanks.

<t> Total noob question here, I am just a few turns into my first campaign. <br/>
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How do I persuade the rail repair units to actually repair the rail point I wish? This thread suggests you can do this by placing them on the rail line, but when I do this I see repair parties deployed all over ...