Lewis Short
cătascŏpus | cătascŏpĭum, ii (noun M.n) : m., = κατάσκοπος (exploring, spying (, , n., Gell. 10, 25 fin.), = κατασκόπιον
* A lookoutship, a spy-ship, a vessel sent out to reconnoitre (pure Lat. navigium speculatorium), Auct. B. Afr. 26; cf. Isid. Orig. 19, 1, 18.
Charlton T. Lewis, Charles Short, A Latin Dictionary