Allow me to quote myself in order to add that instead, or in addition to, the Barnacles may draw our attention by scanning us, assuming we get a scan notice in the SRV.Here's a little idea...
MB said:
A) We will know when a Large Barnacle is nearby.
B) They are not so large as to be seen from Orbital Cruise
In combination this suggests to me that the barnacles may emit a loud noise, like the UA does.
Did anybody test yet if a ship cargo scans you whether or not your SRV will notify you of the scan? Or when you drop the UA from the SRV?