Compasses in small craft
| Autor: | LUND, C.A. |
| Páginas: | 66 págs. págs. |
| Fecha: | 1983 |
| Precio: | 10,50 € |
Description of liquid compass, card graduations, removing a bubble, taking a bearing, shadow pin, Pelorus. Earth's magenetism, lines of force, variation, local attraction. Permanent magnetism, various ways in which ship may be megnetised, how deviation is caused, resolution and forces. Induced magenetism, hard and soft iron, Flinders bar quadrantal correctors, heeling error, screening. Precautions before swingin ship. Swinging ship, transists, naming the deviation plotting a curve, finding deviation underway, single distant object. Correcting the compass, athwartship and fore aft magnets ...