πλωτήρ
From LSJ
μεγάλα ὠφελήσεσθε πρὸς ἱστορίαν τῶν κοινῶν → that will be of great benefit to you in order to understand public affairs
English (LSJ)
ῆρος, ὁ, (πλώω)
A sailor, seaman, Archyt. ap. Stob.3.1.112, Ar.Ec.1087, Pl.R. 489a; including rowers, navigators, and passengers, Arist.Pol.1276 b20, 1279a4, Plot.4.3.21; epith. of the Dioscuri, IG42(1).511 (Epid., ii A. D.). 2 swimmer, Nonn.D.1.65, al., Musae.2; of fishes, Opp. H.2.196. II as Adj., floating, λόφος Nonn.D.23.107.