981491r
How to know your course to sayle to any place assigned; & in sayling
to keep to make true to find where you are at any time; &
how farre from any place
to keep to make true to find where you are at any time; &
how farre from any place
In the art of Navigation it is præsupposed that all plottes & sea chartes have
the costes, Islands portes and such places in them described & situated proportionally
and answerable to those thinges places they as well for magnitude
& forme as true course & distance as well for true course & distance
as forme & magnitude & forme. So that those places that have
one latitude or altitude of the pole, stand in a true east & west
course; & those that are in have one meridian, stand in a true North & south
course; & so per consequence all the mid other meane courses
in the chartes signified, must be understoode to be according &
answerable to the true ppoyntes of the compasse,
& not to those of the common or any compasse
else that have variation. But if the compasse vary; by recconing
in sayling, allowance or abatement is to be made that the true
course may be knowne; else shall you be sure to misse your poste
or place
the costes, Islands portes and such places in them described & situated proportionally
and answerable to those thinges places they as well for magnitude
& forme as true course & distance as well for true course & distance
as forme & magnitude & forme. So that those places that have
one latitude or altitude of the pole, stand in a true east & west
course; & those that are in have one meridian, stand in a true North & south
course; & so per consequence all the mid other meane courses
in the chartes signified, must be understoode to be according &
answerable to the true ppoyntes of the compasse,
& not to those of the common or any compasse
else that have variation. But if the compasse vary; by recconing
in sayling, allowance or abatement is to be made that the true
course may be knowne; else shall you be sure to misse your poste
or place
And if in making of chartes such respects be not had; but that places be
set downe by the common compasse, or other compasses as
they be found, then where the compasse [???]
without respect to there variation; then where the compasses do
vary, there do places stand out of there true besides there true distances; & as in
navigation, [???] elevations of the poles for correcting your
dead reckonings would stand you in no steed. Neither could
any navigaton be performed, but only on such courses as
the planes were first found by. For upon other courses accordi
according as they are fur your deviation is greater or lesse
so good be your [???] so much should you sayle of your
purpose wether you considered but therein variation or not;
if the compasse in those such courses have a greater or lesse
variation then before in the courses
set downe by the common compasse, or other compasses as
they be found, then where the compasse [???]
without respect to there variation; then where the compasses do
vary, there do places stand out of there true besides there true distances; & as in
navigation, [???] elevations of the poles for correcting your
dead reckonings would stand you in no steed. Neither could
any navigaton be performed, but only on such courses as
the planes were first found by. For upon other courses accordi
according as they are fur your deviation is greater or lesse
so good be your [???] so much should you sayle of your
purpose wether you considered but therein variation or not;
if the compasse in those such courses have a greater or lesse
variation then before in the courses
And although no chartes [???] those planes so truly situa-
ted as they aought according to
ted as they aought according to