Harriot, Thomas, Mss. 6788

List of thumbnails

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981
981 (491r) 		982
982 (491v)
983
983 (492r) 		984
984 (492v)
985
985 (493r) 		986
986 (493v)
987
987 (494r) 		988
988 (494v)
989
989 (495r) 		990
990 (495v)
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page |< < (491r) of 1134 > >|
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      <text xml:lang="eng" type="free">
        <div type="section" level="1" n="1">
          <pb file="0981.jpg" o="491r" n="981"/>
          <head xml:space="preserve"> How to know your course to sayle to any place assigned; & in sayling
            <lb/>
          to
            <emph style="st">keep to</emph>
          make true
            <emph style="super">to find</emph>
          where you are at any time; &
            <lb/>
          how farre from any place </head>
          <p>
            <s xml:space="preserve"> In the art of Navigation it is præsupposed that
              <emph style="super">all</emph>
            plottes & sea chartes have
              <lb/>
            the costes, Islands
              <emph style="super">portes</emph>
            and
              <emph style="super">such</emph>
            places in them described & situated proportionally
              <lb/>
            and answerable to those
              <emph style="st">thinges</emph>
              <emph style="super">places</emph>
            they
              <emph style="st">as well for magnitude</emph>
              <lb/>
              <emph style="st">& forme as true course & distance</emph>
            as well for true course & distance
              <lb/>
            as
              <emph style="super">forme &</emph>
            magnitude
              <emph style="st"/>
            & forme. So that those places that have
              <lb/>
            one latitude or altitude of the pole, stand in a true east & west
              <lb/>
            course; & those that
              <emph style="st">are in</emph>
              <emph style="super">have</emph>
            one meridian, stand in a
              <emph style="super">true</emph>
            North & south
              <lb/>
            course; & so per consequence all the
              <emph style="st">mid</emph>
            other meane courses
              <lb/>
            in the chartes signified, must be understoode to be according &
              <lb/>
            answerable to the true
              <emph style="super">ppoyntes of the</emph>
            compasse,
              <lb/>
            & not to
              <emph style="super">those of</emph>
            the common or any compasse
              <lb/>
            else that have variation. But if the compasse vary; by recconing
              <lb/>
            in sayling, allowance or abatement is to be made that the true
              <lb/>
            course may be knowne; else shall you be sure to misse your poste
              <lb/>
            or place </s>
          </p>
          <p>
            <s xml:space="preserve"> And if in
              <emph style="super">making of</emph>
            chartes such respects be not had; but that places be
              <lb/>
            set downe by the common compasse, or other compasses as
              <lb/>
            they be found,
              <emph style="st">then where the compasse [???]</emph>
              <lb/>
              <emph style="super">without</emph>
            respect to there variation; then where the compasses do
              <lb/>
            vary, there do places stand out of there true
              <emph style="super">besides there true distances</emph>
            ; &
              <emph style="st">as</emph>
            in
              <lb/>
            navigation, [???] elevations of the poles for correcting your
              <lb/>
            dead reckonings would stand you in no steed. Neither could
              <lb/>
            any navigaton be performed, but only on such courses as
              <lb/>
            the planes were first found by. For upon other courses
              <emph style="st">accordi</emph>
              <lb/>
            according as
              <emph style="st">they are fur</emph>
            your deviation is greater or lesse
              <lb/>
              <emph style="st">so good be your [???]</emph>
            so much should you sayle of your
              <lb/>
            purpose wether you considered
              <emph style="st">but</emph>
            therein variation or not;
              <lb/>
            if the compasse in
              <emph style="st">those</emph>
              <emph style="super">such</emph>
            courses have a greater or lesse
              <lb/>
            variation then
              <emph style="super">before</emph>
            in the courses </s>
          </p>
          <p>
            <s xml:space="preserve"> And although
              <emph style="super">no</emph>
            chartes
              <emph style="st">[???]</emph>
            those planes so truly situa-
              <lb/>
            ted as they aought according to </s>
          </p>
        </div>
      </text>
    </echo>
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