|
Floating and nonsubmersible nautical craft - Patent 4494472 (2840 words) |
 | Nautical craft according to claim 1 or 2, characterized by the fact that the floats are pivotally mounted on axes horizontal and parallel to the main plane of symmetry of the craft, further comprising webs connected to said floats and transverse cheekplates forming a bearing surface with which said webs cooperate. |
| Nautical craft according to claim 1 or 2, characterized by the fact that the means of access include a pair of openings, one being in a forward location and the other in an after location in said hull. |
| Nautical craft according to claim 1 or 2, characterized by the fact that the means of surface viewing comprising a porthole placed on the frontal section, having the general shape of a dome in the form of an ellipsoidal cap with horizontal short axis. |
| NOAA 200th: Foundations: Nautical Charts (1690 words) |
| A nautical chart depicts the nature and shape of the coast, water depths, and general topography of the ocean floor; locations of navigational danger; the rise and fall of tides; and locations of human-made aids to navigation. |
| The nautical chart is one of the most fundamental tools available to mariners, who use charts to plan voyages and navigate ships using the shortest, safest, and most economical routes. |
| Nautical charts are also snapshots of advancements made in surveying and mapping technology. |
Feeds |
Contact