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Bøker Bok 19 av 9The most usual way of discovering the set and drift of an unknown current, is thus...
" 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... "
The Practical Navigator, and Seaman's New Daily Assistant: Being an Epitome ... - Side 124
av John Hamilton Moore - 1791 - 296 sider
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The New Practical Navigator: Being a Complete Epitome of Navigation to which ...

John Hamilton Moore - 1807 - 328 sider
...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...
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The New Practical Navigator: Being a Complete Epitome of Navigation: to ...

John Hamilton Moore - 1807 - 328 sider
...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...
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The British Critic, Volum 31

1808
...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...
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The New Practical Navigator: Being a Complete Epitome of Navigation: to ...

John Hamilton Moore - 1810 - 336 sider
...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...
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A Philosophical and Mathematical Dictionary: Containing an ..., Volum 2

Charles Hutton - 1815
...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...
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American Practical Navigator

1821
...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...
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The New American Practical Navigator: Being an Epitome of Navigation ...

Nathaniel Bowditch - 1826 - 617 sider
...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...
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The New American Practical Navigator: Being an Epitome of Navigation ...

Nathaniel Bowditch - 1826 - 617 sider
...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...
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A Complete Epitome of Practical Navigation, and Nautical Astronomy ...

John William Norie, J. W. Saul - 1917 - 595 sider
...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....
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