The Practical Navigator, and Seaman's New Daily Assistant: Being an Epitome of Navigation: Including the Different Methods of Working the Lunar Observations. With Every Particular Requisite for Keeping a Complete Journal at Sea ... To this Edition are Added ... the Requisite Tables Used with the Nautical Almanac in Determining the Longitude at Sea ... |
From inside the book
Results 1-5 of 86
Page
... Hours , and the Longitude will be 7 ° 59 ′ West . N. B. The rapid Sale this Book has had fince its firft Publication , has induced Perfons in Scotland and other Places to copy it , many of which have been diftributed in different Parts ...
... Hours , and the Longitude will be 7 ° 59 ′ West . N. B. The rapid Sale this Book has had fince its firft Publication , has induced Perfons in Scotland and other Places to copy it , many of which have been diftributed in different Parts ...
Page 39
... Hours , and 44 Minutes ; it receives its Light and Heat from the Sun , and reflects it upon the Earth , which in fome Measure compensates for the Absence of the Sun , during the Winter Seasons , in the North and South . Mars is still ...
... Hours , and 44 Minutes ; it receives its Light and Heat from the Sun , and reflects it upon the Earth , which in fome Measure compensates for the Absence of the Sun , during the Winter Seasons , in the North and South . Mars is still ...
Page 39
... Hours , and 44 Minutes ; it receives its Light and Heat from the Sun , and reflects it upon the Earth , which in fome Measure compenfates for the Abfence of the Sun , during the Winter Seasons , in the North and South . Mars is ftill ...
... Hours , and 44 Minutes ; it receives its Light and Heat from the Sun , and reflects it upon the Earth , which in fome Measure compenfates for the Abfence of the Sun , during the Winter Seasons , in the North and South . Mars is ftill ...
Page 40
... Hours , from Weft to Eaft , caufe all the heavenly Bodies to revolve apparently from Eaft to Weft in the fame Time , making the Viciffitudes of Day and Night ; and this Earth , toge- ther with its Moon , by moving round the Sun in 1 ...
... Hours , from Weft to Eaft , caufe all the heavenly Bodies to revolve apparently from Eaft to Weft in the fame Time , making the Viciffitudes of Day and Night ; and this Earth , toge- ther with its Moon , by moving round the Sun in 1 ...
Page 41
... Hours , every Point upon its Surface defcribing a Circle of 360 Degrees in that Time , therefore , any Place lying 15 Degrees to the Eaft of us , has the Sun upon its Meridian one Hour fooner ; or it is Twelve o'clock with the ...
... Hours , every Point upon its Surface defcribing a Circle of 360 Degrees in that Time , therefore , any Place lying 15 Degrees to the Eaft of us , has the Sun upon its Meridian one Hour fooner ; or it is Twelve o'clock with the ...
Common terms and phrases
againſt alfo Altitude Anchor Angle Arch Azimuth Bafe becauſe Cafe Cape Chart Co-fecant Co-fine Co-tang Coaft Column Compafs Courfe Courſe Declination Degrees Diff Difference of Latitude Difference of Longitude Dift Dep Dift Lat ditto Eaft Epact Equator Extent will reach fails fame Fathoms fecond fhews fhould find the Courſe find the Difference firft firſt fome ftands fteer fubtract fuch Funchal half haul High Water Hour Angle Hours Ifland laft Latitude and Departure lefs Line of Numbers Line of Sines Logarithm Long meaſured Mercator's Sailing Merid Meridian Meridian Altitude Middle Latitude Miles Moon Moon's muſt N.fine neareſt Noon North Obfervation oppofite Parallax parallel Place Plane Sailing Point Radius Rifing Right Afcenfion Secant ſhe Ship Ship's Side South Star Star's Sun's Suppofe Table Tangent thefe theſe thofe uſed Variation Weft Wefterly Wind ΙΟ
Popular passages
Page 19 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds ; and these into thirds, etc.
Page 14 - EXAMPLE. If the diameter of a circle be 7 inches, and the circumference 22, what is the circumference of another circle, the diameter of which is 14 inches ? Extend from 7 to 22, that extent will reach from 14 to 44 the same way.
Page 32 - ... the sum of the segments of the base is to the sum of the sides as the difference of the sides to the difference of the segments of the base.
Page 14 - All fractions found in this line must be decimals ; and if they are not, they must be reduced into decimals, which is easily done by extending the compasses from the denominator to the numerator; that extent laid the same way, from 1 in the middle or right hand, will reach to the decimal required.
Page 263 - A figurative expression for the timbers. /fuie at anchor, is when a ship is held by her anchors, and is not driven by wind or tide. To ride athwart, is to ride with the ship's side to the tide. To ride hoirie fallen, is •when the water breaks into the hawse in a rough sea.
Page 151 - Complement of the Latitude Is to Radius, So is the Sine of the Sun or Star's Declination To the Sine of the true Amplitude ; Which is always of the fame Name with the Declination, whether North or South.
Page 120 - 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 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.
Page 14 - The solid content of any bale, box, chest, fcc. is found by extending from 1 to the breadth ; that extent will reach from the depth to a fourth number, and the extent from 1 to that fourth number will reach from the length to the solid content.
Page 205 - PM per watch, the altitude of the sun's lower limb was 28° 20' above the horizon of the sea, the eye being elevated 20 feet above the surface of the water, and the sun's bearing by compass S. by W. and at 2h. 58m. 2Gs. PM by watch, the altitude of the sun's lower limb was 16° 41...
Page 164 - A ship lying-to under her mainsail, with her starboard tacks aboard, comes up E. by S. and falls off NE by E. there being one point westerly variation, and she makes 5 points lee-way — what course does she make good ? The middle between E. by S. and NE by E. is E. by N. ; and by allowing 6 points to the left hand (viz.