Spectra Precision FAST Survey Reference Manual - Manual (Page 95)

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If you don’t like the name of the base supplied by the Broadcaster, you can change it to something else you prefer and
FAST Survey will remember your preference but still ask the Broadcaster for the correct base.
Select the base you want to use and press the green check box. You are brought back to the RTK tab with the base you
selected as the current Base ID. You can change the Base ID in the RTK tab without going back to the NTRIP
Configure button.
Note that with NTRIP, FAST Survey already knows if the base wants the rover position sent and what type of
corrections are being sent. Those settings are shown in the RTK tab and are grayed out to guarantee that they stay on
the correct setting.