"For with the aid and counsel of Sauron they multiplied their possessions, and they devised engines, and they built ever greater ships." The Silmarillion, Akallabêth
"The teaching of Sauron has led to the invention of ships of metal that traverse the seas without sails, but which are hideous in the eyes of those who have not abandoned or forgotten Tol-eressea; to the building of grim fortresses and unlovely towers; and to missiles that pass with a noise like thunder to strike their targets many miles away." History of Middle-earth 5, The Númenórean chapters, Chapter IV
“Our ships go now without the wind, and many are made of metal that sheareth rocks, and they sink not in calm or storm; but they are no longer fair to look upon. ... But our shields are impenetrable, our swords cannot be withstood, our darts are like thunder and pass over leagues unerring.” HoMe V.The Lost Road, (ii) The Númenórean chapters
“..., and they [the fleets of the Númenóreans] were like an archipelago of a thousand isles; their masts were as a forest upon the mountains, and their sails like a brooding cloud; ... Then Ar-Pharazôn hardened his heart, and he went aboard his mighty ship, Alcarondas, Castle of the Sea. Many-oared it was and many-masted, golden and sable; ... “ The Silmarillion.Akallabêth
So it was that ere long he turned again from forestry to the building of ships, and a vision came to him of a mighty vessel like a castle with tall masts and great sails like clouds, bearing men and stores enough for a town. Then in the yards of Rómenna the saws and hammers were busy, while among many lesser craft a great ribbed hull took shape; at which men wondered. Turuphanto, the Wooden Whale, they called it, but that was not its name. ... It is recorded that on the prow of Hirilondë he set no bough of oiolairë, but the image of an eagle with golden beak and jewelled eyes, which was the gift of Círdan.
Once upon a time (my crest has long since fallen) 1 had a mind to make a body of more or less connected legend…I would draw some of the great tales in fullness, and leave many only placed in the scheme, and sketched. The cycles should be linked to a majestic whole, and yet leave scope for other minds and hands, wielding paint and music and drama. (Letters: 144-145).