MARIANA ARCHIPELAGO, or LADRONES. GUAHAN. Almost the whole of this island is fringed by reefs, which extend in most parts about a third of a mile from the land. Even where the reefs are most extensive, the water within them is shallow. In several parts there is a navigable channel for boats and canoes within the reefs. In Freycinet's "Hydrog. Mem." there is an account of these reefs, and in the "Atlas," a map on a large scale; coloured red.--ROTA. "L'ile est presque entierement entouree des recifs" (page 212, Freycinet's "Hydrog.英文原著 · 《Coral Reefs》
DEAR SIR: I have just returned from a reconnoissance up Steele's Bayou, with the admiral (Porter), and five of his gunboats. With some labor in cutting tree-tops out of the way, it will be navigable for any class of steamers.英文原著 · 《Memoirs of General William T. Sherman-1》
"What a selfish beast you are, Weldon!" he observed tranquilly. "This is no sack-race; you can't go out to walk in your bag. In fact, it takes two to make a navigable pair. Then why not let me have it?"英文原著 · 《On The Firing Line》
He was confirmed in this opinion when they descended below, where two or three sailors and ruffian-looking fellows awaited their commands. Ewart took the whole direction upon himself, gave his orders with briefness and precision, and looked to their being executed with the silence and celerity which that peculiar crisis required. All were now dismissed for the brig, which lay, as Fairford was given to understand, a little farther down the river, which is navigable for vessels of light burden till almost within a mile of the town.英文原著 · 《Redgauntlet》
Much of interest in the connection must necessarily be omitted for want of space. About forty miles below the Cascades the river receives the Willamette, the last of its great tributaries. It is navigable for ocean vessels as far as Portland, ten miles above its mouth, and for river steamers a hundred miles farther. The Falls of the Willamette are fifteen miles above Portland, where the river, coming out of dense woods, breaks its way across a bar of black basalt and falls forty feet in a passion of snowy foam, showing to fine advantage against its background of evergreens.英文原著 · 《Steep Trails》