A LEADING feature of present-day methods of navigation is the use of tables. There is scarcely any method in use in navigation for which one, and probably many, tables, of more or less practical ...

Marine propulsion systems manufacturer Schottel introduced its new M-series azimuth thrusters, consisting of several medium-sized rudder propeller sizes covering a power range of 400 to 1,000 kW. The ...

WHERE a light on a rock or island has to illuminate constantly the whole horizon, the ordinary dioptric fixed apparatus is all that is required. But when, as at many places, there is a shoal at some ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. William Thomson described a new ...