 | John Hamilton Moore - 1807 - 586 páginas
...depth of 80 or 100 fathoms when it can be, whereby the boat will ride almoft as fteady as at anchor, then heave the log, and the number of knots run out...runs per hour, and the bearing of the log Ihews the fetting of the current. EXAMPLE I. If a fliip fails ENE 98 miles in a current that fets SW 17 miles... | |
 | John Hamilton Moore - 1807 - 676 páginas
...depth of 80 or 100 fathoms when it can be, whereby the boat will ride almoft a» fteady as at anchor, then heave the log, and the number of knots run out...current runs per hour, and the bearing of the log (hews the fetting of the current. EXAMPLE I. If a fhip fails ENE 98 miles in a current that fets SW... | |
 | 1808 - 728 páginas
...depth ef about loo fathoms: then, the log being low, its bearing will be the fitting of the current ; and the number of knots run out in half a minute will be its drift. When in fight of land, the fetting and drift of a current may be found, by obforving... | |
 | John Hamilton Moore - 1810 - 662 páginas
...depth of 80 or 100 fathoms when it can be, whereby the boat will ride almost as steady as at anchor, then heave the log, and the number of knots run out...give the miles which the current runs per hour, and tlfe bearing of the log shows the setting of the current. EXAMPLE I. If a ship sails ENE 98 miles in... | |
 | Charles Hutton - 1815 - 686 páginas
...100 fathoms, when it can be done : by which means the boat will ride almost as steady as at anchor. Then heave the log, and the number of knots run out in half a minute will give the rate of the current, or the miles \vhich it runs per hour; and the hearing of the log shows the setting... | |
 | 1821 - 708 páginas
...to the boat's stern, let down a heavy iron pot or loaded kettle to the depth of 80 or 100 fathoms ; then heave the log, and the number of knots run out in half a minute will be the miles the current sets per hour, and the bearing of the log will show the set of it. There is... | |
 | Nathaniel Bowditch - 1826 - 764 páginas
...to the. boat's stern, let down a heavy iron pot or loaded kettM to the depth of 80 or 100 fathoms ; then heave the log, and the number of knots run out in half a minute will be the miles the current sets per hour, and the bearing of the log will show the set of it. There is... | |
 | Nathaniel Bowditch - 1826 - 732 páginas
...to the boat's stern, let down a heavy iron pot or loaded kettle to the depth of 80 or 100 fathoms ; then heave the log, and the number of knots run out in half a minute will he, the miles the current sets per hour, and the hearing of the log will show the set of it. There... | |
 | John William Norie, J. W. Saul - 1917 - 642 páginas
...nearly as steady as at anchor ; then the log being hove, its bearing will be the setting of the current, and the number of knots run out in half a minute will be its drift per hour. This method is, however, very uncertain, owing to the effect of submarine currents.... | |
| |
The most usual way of discovering the set and drift of an unknown current, is thus : Let three or four men take a boat a little way from the ship : and by a rope fastened to the boat's stern, let down a heavy iron pot or loaded kettle to the depth of... 