Pascagoula and Point aux Chenes bays; separated from it by the shallow and practically unnavigable Mississippi Sound is a chain of low, long and narrow sand islands, the largest of which are Petit Bois, Horn, Ship and Cat.
It is thus unnavigable except for small coasting and fishing boats, and sea-going vessels proceed through the Memeler Tief (Memel Deep), which connects the Baltic with Memel and has a depth of 19 ft.
The timidity of the Danish admiral Ulrik C. Gyldenldve, and the daring of Charles, who forced his nervous and protesting admiral to attempt the passage of the eastern channel of the Sound, the dangerous flinterend, hitherto reputed to be unnavigable, enabled the Swedish king to effect a landing at Humleback in Sjaelland (Zealand), a few miles north of Copenhagen (Aug.
All are swift and unnavigable, save perhaps for a.
From Shigatse, which stands near the mouth of the Nyang Chu, to the Kyi-chu, or Lhasa river, there is no direct route, the river being unnavigable below Shigatse.
Swollen by the melting of the winter snows and by heavy rains in the mountains, it is frequently a torrent, and is thus, except in the last few miles, unnavigable for either boats or rafts.
High and at present unnavigable owing to serious rapids in Lower Burma and at one or two places in the Shan States, but quite open to traffic for considerable reaches in its middle course.
The city stands on the banks of the river Sumida, which, although pretty wide, is unnavigable by vessels of large tonnage owing to its shallowness.
Mainly unnavigable and of little use for irrigation, the Orontes derives its historical importance solely from the convenience of its valley for traffic from N.
All these streams are interrupted by rapids as they descend from the highlands to the plain and are unnavigable by steamers save for a few miles from their mouths.
Finally the sea had overwhelmed Atlantis, and had thenceforward become unnavigable owing to the shoals which marked the spot.
The river, which is unnavigable and winding at this point, forms the western boundary of the city for more than 4 m., and is spanned by three public bridges and a number of railway bridges.
Canals on the Canadian side of these unnavigable stretches admit vessels of a considerable size to lakes Ontario and Erie.
Like the Coppermine, the only other large river of this part of Canada, it is rendered unnavigable by a succession of rapids and rocks.
In consequence of their great slope and the intermittent supply of water the rivers - except the Zambezi - are unnavigable save for a few miles from their mouths.
This has a great volume of water, but is unnavigable because of its steep gradient and many gorges.
It is a large but quite unnavigable stream.
Out of the Alaska and Nutzotin mountains two great rivers flow southward: the Copper, practically unnavigable except for small boats, because of its turbulence and the discharge of glaciers into its waters; and the Susitna, also practically unnavigable.
Of the two great affluents of the Yukon, the Tanana is for the most part unnavigable, while the Koyukuk is navigable for more than 450 m.
These rivers descend from the mountains in great falls, and like the other Abyssinian streams are unnavigable in their upper courses.