Usage: 2 forms in 2 verses
Form Translated As     In Verse(s)
ναυτικούσ mariners LXX.1Kgs.9.27
ναυτικοί mariners LXX.Jonah.1.5

Liddell-Scott-Jones

ναυτικός (nautikos) mariner G:A

ναυτικός-ικός, , όν,

of or for a ship, seafaring, naval, ν. στρατός [Refs 5th c.BC+]; opposed to πεζός, [Refs 5th c.BC+]; ν. ἐρείπια wrecks of ships, [Refs 5th c.BC+]; σκάφη[Refs 5th c.BC+]; ἔγγαια καὶ ναυτικόςικά property on land and sea, [Refs 5th c.BC+]; ν. ἀναρχία among the seamen,[Refs 5th c.BC+]; τὸ ν. crew, [Refs 5th c.BC+]; but usually navy, fleet, [Refs 5th c.BC+]

__2 of persons, skilled in seamanship, nautical, ναυτικόςικοὶ ἐγένοντο became a naval power, [Refs 5th c.BC+]; ναυτικόςικός, , ={ναύτης}, [Refs 2nd c.AD+]
__3 -κή (i.e. τέχνη) navigation, seamanship, [Refs 5th c.BC+] also, naval affairs, sea-power, [Refs 5th c.BC+]
__II ναυτικόςικόν, τό, perhaps pilot's fee, [Refs 2nd c.AD+]; but usually
__II.b money borrowed or lent on bottomry, in full, ν. χρήματα [Refs 5th c.BC+]; ναυτικόςικὸν ἀνελέσθαι to take it up, borrow it, [ναυτικόςικοῖς ἐργάζεσθαι [prev. author] 33.4: in \_sing.\_, 5th-6th c.BC: Xenophon Historicus “de Vectigalibus” 3.9; also ν. τόκος 3rd c.AD(?): Diogenes Laertius 6.99 ">Refs 5th c.BC+]. adverb -κῶς, δανείζειν [Refs]