Description and Use of a Diagram of Navigation: By which All Problems in Plane, Traverse, Parallel, Middle Latitude and Mercator's Sailing May be Instantly and Accurately Resolved. Adapted to the Capacity of All who Know the Use of Figures. Designed as an Easy Introduction, by Sensible Demonstration, to the Principles, and the Practice of Navigation. With a Diagram EngravedFellowes & Simpson, 1822 - 4 σελίδες |
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Σελίδα 4
... for 175 miles difference of lati- tude and 135 miles departure - the Diagram , from a * The Hon . John Davis , LL , D. Judge of the U. S. District Court , in Massachusetts . PREFACE . simple operation , gives the course 370 and.
... for 175 miles difference of lati- tude and 135 miles departure - the Diagram , from a * The Hon . John Davis , LL , D. Judge of the U. S. District Court , in Massachusetts . PREFACE . simple operation , gives the course 370 and.
Σελίδα 15
... lati- tude and the departure be exactly contained within the arc of a semi - circle whose subtense , or chord is equal to the distance sailed , on any oblique course . 63. In plane sailing there are six cases . CASE 1 . 64. Given the ...
... lati- tude and the departure be exactly contained within the arc of a semi - circle whose subtense , or chord is equal to the distance sailed , on any oblique course . 63. In plane sailing there are six cases . CASE 1 . 64. Given the ...
Σελίδα 18
... lati- tude with the departure , it will be on the course , and will give the distance on the index . Example . - A ship sails northeasterly , and her diff . of lat . is 89 miles , and her departure 36 ; required the course and distance ...
... lati- tude with the departure , it will be on the course , and will give the distance on the index . Example . - A ship sails northeasterly , and her diff . of lat . is 89 miles , and her departure 36 ; required the course and distance ...
Σελίδα 22
... lati- tudes . 82. There are seven cases ; and in which these six terms are used , viz : course , distance , difference ' of lat- itude , departure , difference of longitude , and middle latitude .. CASE 1 . $ 3 . Given — the LATITUDES ...
... lati- tudes . 82. There are seven cases ; and in which these six terms are used , viz : course , distance , difference ' of lat- itude , departure , difference of longitude , and middle latitude .. CASE 1 . $ 3 . Given — the LATITUDES ...
Σελίδα 23
... lati- tude with the departure , it will give the course and distance ; then set the index on the middle latitude , and the departure on the equator will give the differ- ence of longitude on the index . Example . - A ship in lat . 42 ...
... lati- tude with the departure , it will give the course and distance ; then set the index on the middle latitude , and the departure on the equator will give the differ- ence of longitude on the index . Example . - A ship in lat . 42 ...
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arc of latitude arc or angle chord circle circumference co-sine co-tangent contiguous angle course 3 points course 3 pts course 38 deg COURSE and DEPARTURE Course and Diff course and distance course sailed curve line departure 84 Diagram of Navigation difference of lati difference of latitude difference of longitude direct course dist DISTANCE and DEPARTURE distance sailed ence of longitude Example Example.-A ship sails find the COURSE find the DISTANCE give the course give the diff give the distance Given both LATITUDES Given-one LATITUDE index remaining index set index to meet meet the difference Mercator's sailing merid meridian distance meridional difference middle lat parallel sailing plane sailing proper diff radius be equal required the course right line drawn right-angled plane triangle Rule Rule.-Set the index secant Set the index ship in lat side as radius side marked equator tance tangent traverse table tude