"McMurdo"
All correct.
But the name "McMurdo" wasn't much of an issue for the crew, because the coodinates were recorded next to the name. The major issue concerning "McMurdo" was the summary of the flightplan sent to McMurdo Station on the morning of the flight. As I understand things, this summary only recorded the coordinates of a waypoint if the waypoint didn't have a name. So on the summary sent to Mac Centre, all that was provided was "McMurdo", with no coordinates. Hence Mahon's belief that the Nav Section were engaging in some sort of cover-up, trying to prevent Mac Centre from finding out about something. (What that something might possibly be is something that I havn't the faintest idea about.)